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opencratertool.py
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opencratertool.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
opencratertool
A QGIS plugin
A tool for crater size-frequency measurements
-------------------
begin : 2023-04-19
copyright : (C) 2023 by Thomas Heyer
email : [email protected]
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
from PyQt5.QtWidgets import QApplication, QWidget, QGraphicsScene
from PyQt5 import QtCore
from qgis.PyQt.QtCore import QSettings, QTranslator, QCoreApplication
from qgis.PyQt.QtGui import QIcon, QColor
from qgis.PyQt.QtWidgets import QAction, QFileDialog, QMenu
# --
from qgis.gui import QgsMapTool, QgsRubberBand,QgsModelGraphicsScene, QgsModelGraphicsView,QgsHighlight
from qgis.PyQt.QtCore import Qt, pyqtSignal, QVariant
from math import sqrt, pi, cos, sin
from qgis.core import QgsFeature, QgsGeometry, QgsWkbTypes, QgsVectorLayer, QgsField, QgsFields, QgsVectorFileWriter, QgsCoordinateReferenceSystem, QgsCoordinateTransform,QgsProject, Qgis, QgsWkbTypes, QgsPointXY,QgsSymbol,QgsRendererCategory,QgsCategorizedSymbolRenderer,QgsSimpleLineSymbolLayer,QgsSingleSymbolRenderer, QgsFeatureRequest,QgsRectangle
import datetime,time
import numpy as np
from pyproj import CRS
from . import pyqtgraph as pg
#from .pyqtgraph import exporters
# experimental
from qgis.PyQt.QtWidgets import QShortcut
from qgis.PyQt.QtGui import QKeySequence
# Initialize Qt resources from file resources.py
from .resources import *
# Import code for dialogs
from .opencratertool_dialog import con0,con1,con2,con3,con4,con5,con6,con7,con8
import os.path
def g_mean(x):
a = np.log(x)
return np.exp(a.mean())
class opencratertool:
"""QGIS Plugin Implementation."""
def __init__(self, iface):
# Save reference to the QGIS interface
self.iface = iface
self.canvas = self.iface.mapCanvas()
# Initialize plugin directory
self.plugin_dir = os.path.dirname(__file__)
# Initialize locale
locale = QSettings().value('locale/userLocale')[0:2]
locale_path = os.path.join(
self.plugin_dir,
'i18n',
'opencratertool_{}.qm'.format(locale))
if os.path.exists(locale_path):
self.translator = QTranslator()
self.translator.load(locale_path)
QCoreApplication.installTranslator(self.translator)
# Declare instance attributes
self.actions = []
self.menu = self.tr(u'&opencratertool')
# Check if plugin was started the first time in current QGIS session
# Must be set in initGui() to survive plugin reloads
self.first_start = None
# noinspection PyMethodMayBeStatic
def tr(self, message):
# noinspection PyTypeChecker,PyArgumentList,PyCallByClass
return QCoreApplication.translate('opencratertool', message)
def add_action(
self,
icon_path,
text,
callback,
enabled_flag=True,
add_to_menu=True,
add_to_toolbar=True,
status_tip='OCT',
whats_this=None,
checkable=False,
menu=None,
parent=None):
icon = QIcon(icon_path)
action = QAction(icon, text, parent)
action.triggered.connect(callback)
action.setEnabled(enabled_flag)
action.setCheckable(checkable)
if status_tip is not None:
action.setStatusTip(status_tip)
if whats_this is not None:
action.setWhatsThis(whats_this)
if menu is not None:
action.setMenu(menu)
if add_to_toolbar:
# Adds plugin icon to Plugins toolbar
self.iface.addToolBarIcon(action)
if add_to_menu:
self.iface.addPluginToVectorMenu(
self.menu,
action)
self.actions.append(action)
return action
# Create menu entries and toolbar icons inside the QGIS GUI
def initGui(self):
# Set version of the tool
self.version='Version: 0.2 (2023-11-16)'
# Create icon for two point tool
icon_path = ':/plugins/opencratertool/ui/iconA.png'
self.add_action(
icon_path,
text=self.tr(u'Two Point Circle'),
checkable=True,
callback=self.main2,
parent=self.iface.mainWindow())
# Create icon for three point tool
icon_path = ':/plugins/opencratertool/ui/iconB.png'
self.add_action(
icon_path,
text=self.tr(u'Three Point Circle'),
checkable=True,
callback=self.main3,
parent=self.iface.mainWindow())
# Create icon for mark crater tool
icon_path = ':/plugins/opencratertool/ui/iconC.png'
self.add_action(
icon_path,
text=self.tr('Mark/Unmark latest Crater or Selected Craters'),
callback=self.main4,
parent=self.iface.mainWindow())
# Create icon for shapefile tool
pointMenu = QMenu()
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon1.png'),
self.tr('Create Shapefiles'), self.opt1)
# Create icon for crater export tool
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon2.png'),
self.tr('Export Craters'), self.opt2)
pointMenu.addSeparator()
# Create icon for preview plot tool
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon3.png'),
self.tr('Preview Plot'), self.opt3)
# Create icon for grid tool
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon4.png'),
self.tr('Create Grid'), self.opt4)
# Create icon for map scale tool
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon5.png'),
self.tr('Set Map Scale'), self.opt5)
pointMenu.addSeparator()
# Create icon for crater import tool
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon6.png'),
self.tr('Import Craters'), self.opt6)
# Create icon for area import tool
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon7.png'),
self.tr('Import Areas'), self.opt7)
pointMenu.addSeparator()
# Create icon for crater compare tool
pointMenu.addAction(
QIcon(':/plugins/opencratertool/ui/icon8.png'),
self.tr('Compare Counts'), self.opt8)
# Create icon for tool description
icon_path = ':/plugins/opencratertool/ui/icon0.png'
self.add_action(
icon_path,
text=self.tr('OpenCraterTool'),
menu=pointMenu,
callback=self.main1,
parent=self.iface.mainWindow())
# Define number of segments of the shapefile circles
self.iface.shapefilesegments=150
# Define number segments of the rubberband circle
self.iface.rubberbandsegments=100
#
self.first_start = True
self.iface.drawmode=0
self.draw2PointCrater = self.Draw2PointCrater(self.iface)
self.draw3PointCrater = self.Draw3PointCrater(self.iface)
# Load user interfaces
self.con0 = con0() # tool description
self.con1 = con1() # shapefile tool
self.con2 = con2() # crater export tool
self.con3 = con3() # preview plot tool
self.con4 = con4() # grid tool
self.con5 = con5() # map scale tool
self.con6 = con6() # crater import tool
self.con7 = con7() # area import tool
self.con8 = con8() # crater compare tool
# Connect actions for tool description
self.con0.info_version.setText(self.version)
# Connect actions for shapefile tool
self.con1.push_run.clicked.connect(self.opt1_run)
# Connect actions for crater export tool
self.con2.combo_fractions.currentIndexChanged.connect(self.change_con2_fractions)
self.con2.combo_marked.currentIndexChanged.connect(self.change_con2_marked)
self.con2.combo_export.currentIndexChanged.connect(self.change_con2_export)
self.con2.push_all.clicked.connect(self.click_expo_selectall)
self.con2.push_none.clicked.connect(self.click_expo_selectnone)
self.con2.combo_area.currentIndexChanged.connect(self.change_expo_area_list)
self.con2.combo_crat.currentIndexChanged.connect(self.change_expo_crat_index)
self.con2.push_run.clicked.connect(self.opt2_run)
# Connect actions for preview plot tool
self.con3.combo_fractions.currentIndexChanged.connect(self.change_con3_fractions)
self.con3.combo_marked.currentIndexChanged.connect(self.change_con3_marked)
self.con3.push_all.clicked.connect(self.click_plot_selectall)
self.con3.push_none.clicked.connect(self.click_plot_selectnone)
self.con3.combo_area.currentIndexChanged.connect(self.change_plot_area_list)
self.con3.combo_crat.currentIndexChanged.connect(self.change_plot_crat_index)
self.con3.push_plot.clicked.connect(self.plotstats)
# Connect actions for grid tool
self.con4.push_all.clicked.connect(self.click_grid_selectall)
self.con4.push_none.clicked.connect(self.click_grid_selectnone)
self.con4.combo_area.currentIndexChanged.connect(self.change_grid_area_list)
self.con4.push_preview.clicked.connect(self.previewnet)
self.con4.push_export.clicked.connect(self.exportnet)
# Connect actions for map scale tool
self.con5.push_run.clicked.connect(self.opt5_run)
# Connect actions for import crater tool
self.con6.push_run.clicked.connect(self.opt6_run)
self.con6.combo_crat.currentIndexChanged.connect(self.change_con6_crat_index)
# Connect actions for import area tool
self.con7.push_run.clicked.connect(self.opt7_run)
self.con7.combo_area.currentIndexChanged.connect(self.change_con7_area_index)
# Connect actions for crater compare tool
self.con8.combo_crat1.currentIndexChanged.connect(self.change_con8_crat_index)
self.con8.combo_crat2.currentIndexChanged.connect(self.change_con8_refe_index)
self.con8.push_plot.clicked.connect(self.opt8_run)
self.con8.combo_mode.currentIndexChanged.connect(self.change_con8_mode_index)
self.con8.push_expo.clicked.connect(self.exportcompare)
self.con8.progressBar.hide()
QApplication.setAttribute(QtCore.Qt.HighDpiScaleFactorRoundingPolicy.PassThrough)
# Add shortcut to set the map scale
shortcut = QShortcut(QKeySequence(Qt.ShiftModifier + Qt.Key_S), self.iface.mainWindow())
shortcut.setContext(Qt.ApplicationShortcut)
shortcut.activated.connect(self.setscale)
# set options
self.exportfractions=True
self.excludemarked=False
self.comparemodeindex=0
self.exportformatindex=0
self.scene=QGraphicsScene()
# Create pseudo-log bins described in Neukum (1983) and Hartmann and Neukum (2001)
self.bins=np.array([])
for n in range(7):
self.bins=np.concatenate((self.bins, np.array([1.,1.1,1.2,1.3,1.4,1.5,1.7,2.,2.5,3.0,3.5,4.,4.5,5.,6.,7.,8.,9.])*(10**(n-2))))
# Compare tool
self.diams=[]
self.error=[]
self.errorR=[]
# Grid style
self.nb = QgsRubberBand(self.canvas, QgsWkbTypes.PolygonGeometry)
self.nb.setColor(QColor(0, 197, 255))
self.nb.setFillColor(QColor(0,0,0,0))
self.nb.setWidth(1)
# Create dateline object for north pole projection
self.iface.datelineN = QgsGeometry.fromPolygonXY([[
QgsPointXY( -0.0001, -1),
QgsPointXY( -0.0001, -0.001),
QgsPointXY( -0.0001, -0.00001),
QgsPointXY( 0.0001, -0.00001),
QgsPointXY( 0.0001, -0.001),
QgsPointXY( 0.0001, -1),
QgsPointXY( 0.0001, -100000000),
QgsPointXY( -0.0001, -100000000)]])
# Create dateline object for south pole projection
self.iface.datelineS = QgsGeometry.fromPolygonXY([[
QgsPointXY( 0.0001, 1),
QgsPointXY( 0.0001, 0.001),
QgsPointXY( 0.0001, 0.00001),
QgsPointXY( -0.0001, 0.00001),
QgsPointXY( -0.0001, 0.001),
QgsPointXY( -0.0001, 1),
QgsPointXY( -0.0001, 100000000),
QgsPointXY( 0.0001, 100000000)]])
# Removes the plugin menu item and icon from QGIS GUI
def unload(self):
for action in self.actions:
self.iface.removePluginMenu(
self.tr(u'&opencratertool'),
action)
self.iface.removeToolBarIcon(action)
# Function to plot the crater-size-frequency
class craterPlotWidget(pg.PlotWidget):
def __init__(self,os, **kwargs):
super().__init__(**kwargs)
self.os=os # original self
for k in range(len(self.os.cum)):
maxerror=(self.os.cum[k]+self.os.cum[k]**(1/2))/self.os.expo_area_all
minerror=(self.os.cum[k]-self.os.cum[k]**(1/2))/self.os.expo_area_all
if minerror==0:
minerror=0.2/self.os.expo_area_all
x=np.array([self.os.middle[k],self.os.middle[k]])
y=np.array([maxerror,minerror])
errorbar = pg.PlotDataItem(x,y, pen=pg.mkPen((30,30,30), width=2)) #,antialias=True
self.addItem(errorbar)
self.cum_corrected=self.os.cum / self.os.expo_area_all
self.s1 = pg.PlotDataItem(self.os.middle,self.cum_corrected, pen=None, symbol='o', symbolSize = 10, symbolBrush =(30,30,30),antialias=True)
self.addItem(self.s1)
self.s1.sigPointsClicked.connect(self.clickitem)
self.setBackground((255,255,255))
self.showGrid(x=True,y=True)
self.setLabel('left', 'N[cum]/km²')
self.setLabel('bottom', 'Crater Diameter [km]')
self.setLogMode(True, True)
self.resize(440, 330)
def clickitem(self,e,p):
try:
self.removeItem(self.selectionplot)
except:
pass
# Index of clicked item
k=p[0].index()
selection=[]
for f in self.os.crater_data:
diam=f.attribute('Diam_km')
if diam > self.os.lower[k] and diam < self.os.upper[k]:
selection.append(f.id())
self.os.iface.mainWindow().findChild(QAction, 'mActionDeselectAll').trigger()
layer_crat = QgsProject.instance().mapLayersByName(self.os.crat_layer_list[self.os.crat_layer_index])[0]
layer_crat.selectByIds(selection)
temp_diam=self.os.middle[k]
temp_cum=self.cum_corrected[k]
self.selectionplot = pg.PlotDataItem([temp_diam],[temp_cum], pen=None, symbol='o', symbolSize = 11, symbolBrush =(51,153,255))
self.addItem(self.selectionplot)
# Add ui infos
self.os.con3.info5.setText('Bin: '+'{:.3f} km'.format(self.os.lower[k])+' - {:.3f} km'.format(self.os.upper[k]))
self.os.con3.info6.setText('Number of Craters: '+str(len(selection)))
# Function to plot the crater comparison statistics
class comparePlotWidget(pg.PlotWidget):
def __init__(self,os, **kwargs):
super().__init__(**kwargs)
self.os=os # original self
if self.os.comparemodeindex==0:
#absolute values meter
self.s1 = pg.PlotDataItem(self.os.middle,self.os.binnedmean, pen=None, symbol='s', symbolSize = 10, symbolBrush =(40,40,40))
self.setLabel('left', 'Diameter - Reference Diameter [m]')
self.s2 = pg.PlotDataItem(self.os.diams,self.os.error, pen=None, symbol='o', symbolSize = 7, symbolBrush =(200,200,200))
self.addItem(self.s2)
elif self.os.comparemodeindex==1:
#relative values %
self.s1 = pg.PlotDataItem(self.os.middle,self.os.binnedP, pen=None, symbol='s', symbolSize = 10, symbolBrush =(40,40,40))
self.setLabel('left', '(Diameter / Reference Diameter) - 1 [%]')
self.s2 = pg.PlotDataItem(self.os.diams,self.os.errorP, pen=None, symbol='o', symbolSize = 7, symbolBrush =(200,200,200))
self.addItem(self.s2)
else:
#relative values ratio
self.s1 = pg.PlotDataItem(self.os.middle,self.os.binnedR, pen=None, symbol='s', symbolSize = 10, symbolBrush =(40,40,40))
self.setLabel('left', 'Diameter / Reference Diameter')
self.s2 = pg.PlotDataItem(self.os.diams,self.os.errorR, pen=None, symbol='o', symbolSize = 7, symbolBrush =(200,200,200))
self.addItem(self.s2)
self.s2.sigPointsClicked.connect(self.clickpair)
self.s1.sigPointsClicked.connect(self.clickitem)
self.addItem(self.s1)
self.setBackground((255,255,255))
self.showGrid(x=True,y=True)
self.setLabel('bottom', 'Reference Crater Diameter [km]')
self.setLogMode(True, False)
self.last=''
self.first=False
self.resize(440, 330)
# Function for
def mouse_clicked(self, mouseClickEvent):
pass
# Function for
def clickpair(self,e,p):
try:
self.removeItem(self.selectionplot)
except:
pass
k=p[0].index()
selection=[self.os.rid[k]]
layer_crat = QgsProject.instance().mapLayersByName(self.os.crat_layer_list[self.os.refe_layer_index])[0]
self.os.iface.mainWindow().findChild(QAction, 'mActionDeselectAll').trigger()
layer_crat.selectByIds(selection)
if self.os.comparemodeindex==0:
self.selectionplot = pg.PlotDataItem([self.os.diams[k]],[self.os.error[k]], pen=None, symbol='o', symbolSize = 8, symbolBrush =(51,153,255))
self.os.con8.info5.setText('Difference: {:.2f} m'.format(self.os.error[k]))
elif self.os.comparemodeindex==1:
self.selectionplot = pg.PlotDataItem([self.os.diams[k]],[self.os.errorP[k]], pen=None, symbol='o', symbolSize = 8, symbolBrush =(51,153,255))
self.os.con8.info5.setText('Difference: {:.2f} %'.format(self.os.errorP[k]))
else:
self.selectionplot = pg.PlotDataItem([self.os.diams[k]],[self.os.errorR[k]], pen=None, symbol='o', symbolSize = 8, symbolBrush =(51,153,255))
self.os.con8.info5.setText('Ratio: {:.2f}'.format(self.os.errorR[k]))
self.addItem(self.selectionplot)
box = layer_crat.boundingBoxOfSelected()
self.os.iface.mapCanvas().setExtent(box)
self.os.iface.mapCanvas().refresh()
# Function for
def clickitem(self,e,p):
try:
self.removeItem(self.selectionplot)
except:
pass
k=p[0].index()
selection=[]
layer_crat = QgsProject.instance().mapLayersByName(self.os.crat_layer_list[self.os.refe_layer_index])[0]
for f in layer_crat.getFeatures():
diam=f.attribute('Diam_km')
if diam > self.os.lower[k] and diam < self.os.upper[k]:
selection.append(f.id())
self.os.iface.mainWindow().findChild(QAction, 'mActionDeselectAll').trigger()
layer_crat.selectByIds(selection)
temp_diam=self.os.middle[k]
if self.os.comparemodeindex==0:
temp_cum=self.os.binnedmean[k]
self.os.con8.info5.setText('Number of Craters: '+'{:.0f}'.format(self.os.binnedcount[k])+' Mean Difference: {:.2f} m'.format(self.os.binnedmean[k]))
elif self.os.comparemodeindex==1:
temp_cum=self.os.binnedP[k]
self.os.con8.info5.setText('Number of Craters: '+'{:.0f}'.format(self.os.binnedcount[k])+' Mean Difference: {:.2f} %'.format(self.os.binnedP[k]))
else:
temp_cum=self.os.binnedR[k]
self.os.con8.info5.setText('Number of Craters: '+'{:.0f}'.format(self.os.binnedcount[k])+' Mean Ratio: {:.4f}'.format(self.os.binnedR[k]))
self.selectionplot = pg.PlotDataItem([temp_diam],[temp_cum], pen=None, symbol='s', symbolSize = 11, symbolBrush =(51,153,255))
self.addItem(self.selectionplot)
# Function for drawing craters using two user-defined points ----------------------------------------------
class Draw2PointCrater(QgsMapTool):
selectionDone = pyqtSignal()
move = pyqtSignal()
def __init__(self, iface):
QgsMapTool.__init__(self, iface.mapCanvas())
self.canvas = iface.mapCanvas()
self.iface = iface
self.rb = QgsRubberBand(self.canvas, QgsWkbTypes.PolygonGeometry)
self.rb.setColor(QColor(0, 197, 255))
self.rb.setFillColor(QColor(0,0,0,0))
self.rb.setWidth(1)
self.firstClick=False
self.craterDone=False
def twoPointCircle(self,segments):
try:
# Transform projection from source to latlon
crs_source =QgsCoordinateReferenceSystem.fromProj4(self.iface.activeLayer().crs().toProj4())
geod = str(CRS.from_proj4(self.iface.activeLayer().crs().toProj4()).get_geod()).split("'")[1]
crs_lonlat = QgsCoordinateReferenceSystem.fromProj4('+proj=lonlat '+geod+' +no_defs +type=crs')
SourceToLonlat = QgsCoordinateTransform(crs_source, crs_lonlat, QgsProject.instance().transformContext())
# Calculate center of two points
p1= SourceToLonlat.transform(self.point1)
p2= SourceToLonlat.transform(self.point2)
crs_AeqdCenter = QgsCoordinateReferenceSystem.fromProj4('+proj=aeqd +lat_0='+str(p1.y())+' +lon_0='+str(p1.x())+' +x_0=0 +y_0=0 '+geod+' +units=m +no_defs +type=crs')
LonlatTocrs_AeqdS = QgsCoordinateTransform(crs_lonlat, crs_AeqdCenter, QgsProject.instance().transformContext())
AeqdSToLonlat = QgsCoordinateTransform(crs_AeqdCenter, crs_lonlat, QgsProject.instance().transformContext())
np1=LonlatTocrs_AeqdS.transform(p1)
np2=LonlatTocrs_AeqdS.transform(p2)
line = QgsGeometry.fromPolylineXY([np1, np2])
center=line.centroid().asPoint()
center_lonlat = AeqdSToLonlat.transform(center)
self.center_lon = center_lonlat.x()
self.center_lat = center_lonlat.y()
crs_Aeqd = QgsCoordinateReferenceSystem.fromProj4('+proj=aeqd +lat_0='+str(self.center_lat)+' +lon_0='+str(self.center_lon)+' +x_0=0 +y_0=0 '+geod+' +units=m +no_defs +type=crs')
SourceToAeqd = QgsCoordinateTransform(crs_source, crs_Aeqd, QgsProject.instance().transformContext())
# Project points
point1 = QgsPointXY( 0,0)
point2 = SourceToAeqd.transform(self.point2)
# Calculate circle in projection
diam = sqrt(point1.sqrDist(point2))
points=[]
for itheta in range(segments):
theta = itheta * (2.0 * pi / segments)
points.append((diam * cos(theta),diam * sin(theta)))
polygon = QgsGeometry.fromMultiPolygonXY( [[[ QgsPointXY( p[0], p[1] ) for p in points ]]] )
diamx1=polygon.boundingBox().yMaximum()
diamx2=polygon.boundingBox().yMinimum()
self.diam=(diamx1-diamx2)/1000
# Cut circles that intersect the dateline and the poles
if center_lonlat.y()>0:
#North
crs_AqedNorth = QgsCoordinateReferenceSystem.fromProj4('+proj=aeqd +lat_0=90 +lon_0=180 +x_0=0 +y_0=0 '+geod+' +units=m +no_defs +type=crs')
AeqdToAqedNorth = QgsCoordinateTransform(crs_Aeqd, crs_AqedNorth, QgsProject.instance().transformContext())
AqedNorthToSource = QgsCoordinateTransform(crs_AqedNorth, crs_source, QgsProject.instance().transformContext())
polygon.transform(AeqdToAqedNorth)
polygonB=polygon.difference(self.iface.datelineN)
polygonB.transform(AqedNorthToSource)
self.rb.reset(QgsWkbTypes.PolygonGeometry)
self.rb.addGeometry(polygonB)
else:
#South
crs_AqedSouth = QgsCoordinateReferenceSystem.fromProj4('+proj=aeqd +lat_0=-90 +lon_0=180 +x_0=0 +y_0=0 '+geod+' +units=m +no_defs +type=crs')
AeqdToAqedSouth = QgsCoordinateTransform(crs_Aeqd, crs_AqedSouth, QgsProject.instance().transformContext())
AqedSouthToSource = QgsCoordinateTransform(crs_AqedSouth, crs_source, QgsProject.instance().transformContext())
polygon.transform(AeqdToAqedSouth)
polygonB=polygon.difference(self.iface.datelineS)
polygonB.transform(AqedSouthToSource)
self.rb.reset(QgsWkbTypes.PolygonGeometry)
self.rb.addGeometry(polygonB)
except:
pass
def canvasPressEvent(self, e):
pass
def canvasMoveEvent(self, e):
# Build rubber band
if self.firstClick==True:
self.point2 = self.toMapCoordinates(e.pos())
self.twoPointCircle(self.iface.rubberbandsegments)
self.rb.show()
self.move.emit()
def canvasReleaseEvent(self, e):
if(self.iface.activeLayer().name().upper().startswith('CRATER') or self.iface.activeLayer().name().upper().endswith('CRATER')):
if e.button() == Qt.LeftButton:
if self.firstClick==False:
self.firstClick=True
self.craterDone=False
self.point1 = self.toMapCoordinates(e.pos())
self.iface.mainWindow().findChild(QAction, 'mActionDeselectAll').trigger()
else:
self.firstClick=False
self.point2 = self.toMapCoordinates(e.pos())
self.twoPointCircle(self.iface.shapefilesegments)
polygon=self.rb.asGeometry()
# Write circle to shapefile
layer = self.iface.activeLayer()
poly = QgsFeature(layer.fields())
poly.setGeometry(polygon)
try:
poly.setAttribute("Diam_km",self.diam)
poly.setAttribute("x_coord",self.center_lon)
poly.setAttribute("y_coord",self.center_lat)
poly.setAttribute("tag","standard")
layer.startEditing()
layer.addFeature(poly)
layer.commitChanges()
layer.startEditing()
self.craterDone=True
self.rb.reset(QgsWkbTypes.PolygonGeometry)
except:
self.iface.messageBar().pushMessage("Wrong Shapefile", duration=3)
else:
self.rb.reset(QgsWkbTypes.PolygonGeometry)
self.firstClick=False
if self.craterDone:
layer = self.iface.activeLayer()
layer.startEditing()
layer.deleteFeature(layer.featureCount()-1)
layer.commitChanges()
layer.startEditing()
self.craterDone=False
else:
self.iface.messageBar().pushMessage("Select the 'CRATER' shapefile.", duration=3)
# Function for drawing craters using three user-defined points ----------------------------------------------
class Draw3PointCrater(QgsMapTool):
selectionDone = pyqtSignal()
move = pyqtSignal()
def __init__(self, iface):
QgsMapTool.__init__(self, iface.mapCanvas())
self.canvas = iface.mapCanvas()
self.iface = iface
self.rb = QgsRubberBand(self.canvas, QgsWkbTypes.PolygonGeometry)
self.rb.setColor(QColor(0, 197, 255))
self.rb.setFillColor(QColor(0,0,0,0))
self.rb.setWidth(1)
self.firstClick=False
self.secondClick=False
self.craterDone=False
def threePointCircle(self,segments):
try:
# Transform projection from source to latlon
crs_source =QgsCoordinateReferenceSystem.fromProj4(self.iface.activeLayer().crs().toProj4())
geod = str(CRS.from_proj4(self.iface.activeLayer().crs().toProj4()).get_geod()).split("'")[1]
crs_lonlat = QgsCoordinateReferenceSystem.fromProj4('+proj=lonlat '+geod+' +no_defs +type=crs')
SourceToLonlat = QgsCoordinateTransform(crs_source, crs_lonlat, QgsProject.instance().transformContext())
# Calculate center of two points
point1= SourceToLonlat.transform(self.point1)
point2= SourceToLonlat.transform(self.point2)
point3= SourceToLonlat.transform(self.point3)
x1=point1.x()
y1=point1.y()
x2=point2.x()
y2=point2.y()
x3=point3.x()
y3=point3.y()
c = (x1-x2)**2 + (y1-y2)**2
a = (x2-x3)**2 + (y2-y3)**2
b = (x3-x1)**2 + (y3-y1)**2
s = 2*(a*b + b*c + c*a) - (a*a + b*b + c*c)
px = (a*(b+c-a)*x1 + b*(c+a-b)*x2 + c*(a+b-c)*x3) / s # center x
py = (a*(b+c-a)*y1 + b*(c+a-b)*y2 + c*(a+b-c)*y3) / s # center y
ar = a**0.5
br = b**0.5
cr = c**0.5
r = ar*br*cr / ((ar+br+cr)*(-ar+br+cr)*(ar-br+cr)*(ar+br-cr))**0.5
self.center_lon=px
self.center_lat=py
crs_Aeqd = QgsCoordinateReferenceSystem.fromProj4('+proj=aeqd +lat_0='+str(self.center_lat)+' +lon_0='+str(self.center_lon)+' +x_0=0 +y_0=0 '+geod+' +units=m +no_defs +type=crs')
SourceToAeqd = QgsCoordinateTransform(crs_source, crs_Aeqd, QgsProject.instance().transformContext())
AeqdToSource = QgsCoordinateTransform(crs_Aeqd, crs_source, QgsProject.instance().transformContext())
point1 = SourceToAeqd.transform(self.point1)
point2 = SourceToAeqd.transform(self.point2)
point3 = SourceToAeqd.transform(self.point3)
x1=point1.x()
y1=point1.y()
x2=point2.x()
y2=point2.y()
x3=point3.x()
y3=point3.y()
c = (x1-x2)**2 + (y1-y2)**2
a = (x2-x3)**2 + (y2-y3)**2
b = (x3-x1)**2 + (y3-y1)**2
s = 2*(a*b + b*c + c*a) - (a*a + b*b + c*c)
px = (a*(b+c-a)*x1 + b*(c+a-b)*x2 + c*(a+b-c)*x3) / s # center x
py = (a*(b+c-a)*y1 + b*(c+a-b)*y2 + c*(a+b-c)*y3) / s # center y
ar = a**0.5
br = b**0.5
cr = c**0.5
r = ar*br*cr / ((ar+br+cr)*(-ar+br+cr)*(ar-br+cr)*(ar+br-cr))**0.5
#segments=100
points=[]
for itheta in range(segments):
theta = itheta * (2.0 * pi / segments)
points.append((px + r * cos(theta),py + r * sin(theta)))
polygon = QgsGeometry.fromMultiPolygonXY( [[[ QgsPointXY( p[0], p[1] ) for p in points ]]] )
diamx1=polygon.boundingBox().yMaximum()
diamx2=polygon.boundingBox().yMinimum()
self.diam=(diamx1-diamx2)/1000
if self.center_lon>0:
#North
crs_AqedNorth = QgsCoordinateReferenceSystem.fromProj4('+proj=aeqd +lat_0=90 +lon_0=180 +x_0=0 +y_0=0 '+geod+' +units=m +no_defs +type=crs')
AeqdToAqedNorth = QgsCoordinateTransform(crs_Aeqd, crs_AqedNorth, QgsProject.instance().transformContext())
AqedNorthToSource = QgsCoordinateTransform(crs_AqedNorth, crs_source, QgsProject.instance().transformContext())
polygon.transform(AeqdToAqedNorth)
polygonB=polygon.difference(self.iface.datelineN)
polygonB.transform(AqedNorthToSource)
self.rb.reset(QgsWkbTypes.PolygonGeometry)
self.rb.addGeometry(polygonB)
else:
#South
crs_AqedSouth = QgsCoordinateReferenceSystem.fromProj4('+proj=aeqd +lat_0=-90 +lon_0=180 +x_0=0 +y_0=0 '+geod+' +units=m +no_defs +type=crs')
AeqdToAqedSouth = QgsCoordinateTransform(crs_Aeqd, crs_AqedSouth, QgsProject.instance().transformContext())
AqedSouthToSource = QgsCoordinateTransform(crs_AqedSouth, crs_source, QgsProject.instance().transformContext())
polygon.transform(AeqdToAqedSouth)
polygonB=polygon.difference(self.iface.datelineS)
polygonB.transform(AqedSouthToSource)
self.rb.reset(QgsWkbTypes.PolygonGeometry)
self.rb.addGeometry(polygonB)
except:
pass
def canvasPressEvent(self, e):
pass
def canvasMoveEvent(self, e):
if self.secondClick==True:
self.point3 = self.toMapCoordinates(e.pos())
self.threePointCircle(self.iface.rubberbandsegments)
else:
if self.firstClick==True:
polygon = QgsGeometry.fromPolylineXY([self.point1, self.toMapCoordinates(e.pos())])
self.rb.reset(QgsWkbTypes.PolygonGeometry)
self.rb.addGeometry(polygon)
def canvasReleaseEvent(self, e):
if(self.iface.activeLayer().name().upper().startswith('CRATER') or self.iface.activeLayer().name().upper().endswith('CRATER')):
if e.button() == Qt.LeftButton:
if self.firstClick == False:
self.firstClick=True
# Do first click action
self.point1 = self.toMapCoordinates(e.pos())
self.iface.mainWindow().findChild(QAction, 'mActionDeselectAll').trigger()
else:
if self.secondClick == False:
self.secondClick=True
# Do second click action
self.point2 = self.toMapCoordinates(e.pos())
else:
self.threePointCircle(self.iface.shapefilesegments)
self.firstClick=False
self.secondClick=False
polygon=self.rb.asGeometry()
# Write circle to shapefile
layer = self.iface.activeLayer()
poly = QgsFeature(layer.fields())
poly.setGeometry(polygon)
try:
poly.setAttribute("Diam_km",self.diam)
poly.setAttribute("x_coord",self.center_lon)
poly.setAttribute("y_coord",self.center_lat)
poly.setAttribute("tag","standard")
layer.startEditing()
layer.addFeature(poly)
layer.commitChanges()
#layer.selectByIds([layer.featureCount()-1])
layer.startEditing()
self.craterDone=True
self.rb.reset(QgsWkbTypes.PolygonGeometry)
except:
self.iface.messageBar().pushMessage("Wrong Shapefile", duration=3)
else:
self.rb.reset(QgsWkbTypes.PolygonGeometry)
self.firstClick=False
self.secondClick=False
if self.craterDone:
layer = self.iface.activeLayer()
layer.startEditing()
layer.deleteFeature(layer.featureCount()-1)
layer.commitChanges()
layer.startEditing()
self.craterDone=False
# Functions to list craters based on the user-defined settings
def listcraters(self):
layer_area = QgsProject.instance().mapLayersByName(self.area_layer_list[self.area_layer_index])[0]
layer_crat = QgsProject.instance().mapLayersByName(self.crat_layer_list[self.crat_layer_index])[0]
crs_sourceA = QgsCoordinateReferenceSystem.fromProj4(layer_area.crs().toProj4())
crs_sourceC = QgsCoordinateReferenceSystem.fromProj4(layer_crat.crs().toProj4())
geod = str(CRS.from_proj4(layer_area.crs().toProj4()).get_geod()).split("'")[1]
crs_lonlat = QgsCoordinateReferenceSystem.fromProj4('+proj=lonlat '+geod+' +no_defs +type=crs')
SourceAToLonlat = QgsCoordinateTransform(crs_sourceA, crs_lonlat, QgsProject.instance().transformContext())
SourceAToSourceC = QgsCoordinateTransform(crs_sourceA, crs_sourceC, QgsProject.instance().transformContext())
layer_area.startEditing()
self.expo_layer_crsinfo = layer_crat.crs().description()
self.expo_area_info='unit_boundary = {vertex, sub_area, tag, lon, lat'
self.expo_area_info_diam=''
self.expo_area_all = 0
self.expo_perimeter_all = 0
area_vector_counter =0
self.crater_data=[]
for feat in layer_area.getFeatures():
if feat.id() in self.area_list_selection:
center=feat.geometry().centroid().asPoint()
center_lonlat = SourceAToLonlat.transform(center)
shapetemp=feat.geometry()
shapetemp.transform(SourceAToLonlat)
shapepoints=shapetemp.asMultiPolygon()[0][0]
# Build area vector information
area_vectors=''
for i in range(len(shapepoints)):
area_vector_counter=area_vector_counter+1
area_vectors=area_vectors+'\n'+str(area_vector_counter)+'\t'+str(feat.id()+1)+'\text\t'+'{:.14f}'.format(shapepoints[i].x())+'\t'+'{:.14f}'.format(shapepoints[i].y())
crs_laea = QgsCoordinateReferenceSystem.fromProj4('+proj=laea +lat_ts=0 +lat_0='+str(round(center_lonlat.y()))+' +lon_0='+str(round(center_lonlat.x()))+' '+geod+' +units=m +no_defs +type=crs')
SourceAToLaea = QgsCoordinateTransform(crs_sourceA, crs_laea, QgsProject.instance().transformContext())
SourceCToLaea = QgsCoordinateTransform(crs_sourceC, crs_laea, QgsProject.instance().transformContext())
areaLaea=feat.geometry()
areaLaea.transform(SourceAToLaea)
area_km2=areaLaea.area()/1000000 # area in (m2)
perimeter_km=areaLaea.length()/1000 # perimeter in (m)
feat.setAttribute("area",area_km2)
layer_area.updateFeature(feat)
self.expo_area_info=self.expo_area_info+'\n#\n# Area_name '+str(feat.id()+1)+' = '+str(feat.attribute('area_name'))+'\n' + '# Area_size ' +str(feat.id()+1)+' = {:.13f}'.format(area_km2)+' <km^2>\n'+ '# Area_perimeter ' +str(feat.id()+1)+' = {:.13f}'.format(perimeter_km)+' <km>\n#'+area_vectors
self.expo_area_info_diam=self.expo_area_info_diam+'\n# '+str(feat.attribute('area_name'))+' = {:.13f}'.format(area_km2)+' <km^2>\n#'
self.expo_area_all = self.expo_area_all + area_km2
self.expo_perimeter_all = self.expo_perimeter_all + perimeter_km
# List craters
area=feat.geometry()
area.transform(SourceAToSourceC)
roughselectionbox=area.boundingBox()
request = QgsFeatureRequest().setFilterRect(roughselectionbox)
for featc in layer_crat.getFeatures(request):
crater=featc.geometry()
featc.perc='1'
#crater.transform(SourceCToLaea)
cratertag=str(featc.attribute('tag'))
if self.exportfractions == True:
# find fractions of all intersecting craters
if crater.intersects(area) == True:
#crater.transform(SourceCToLaea)
areabefore=crater.area()
craterhalf=crater.difference(area)#areaLaea
areaafter=craterhalf.area()
perc=(areabefore-areaafter)/areabefore
if perc !=1:
featc.perc='{:.13f}'.format(perc)
if self.excludemarked==False or cratertag == 'standard':
self.crater_data.append(featc)
else:
# find all craters with centers in area
crater_center=featc.geometry().centroid()
#crater_center.transform(SourceCToLaea)
if crater_center.within(area):
if self.excludemarked==False or cratertag == 'standard':
self.crater_data.append(featc)
layer_area.commitChanges()
# Functions to export crater-size-frequency measurements
def exportstats(self):
self.listcraters()
layer = QgsProject.instance().mapLayersByName(self.crat_layer_list[self.crat_layer_index])[0]
crs=CRS.from_proj4(layer.crs().toProj4())
ellipsoid_info='\na-axis radius = {:.1f}'.format(crs.ellipsoid.semi_major_metre/1000)+' <km>\nb-axis radius = {:.1f}'.format(crs.ellipsoid.semi_minor_metre/1000)+' <km>\nc-axis radius = {:.1f}'.format(crs.ellipsoid.semi_major_metre/1000)+' <km>'
crater_info=''
for f in self.crater_data:
crater_info=crater_info+'{:.13f}'.format(f.attribute('Diam_km'))+'\t'+f.perc+'\t'+'{:.13f}'.format(f.attribute('x_coord'))+'\t'+'{:.13f}'.format(f.attribute('y_coord'))+'\t'+'1'+'\n'
# Combine all information for diam/scc export
if self.exportformatindex==0:
# Export scc file
header = [
'# Spatial crater count',
'#',
'# Date of measurement = {}'.format(str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))),
'#',
'# Ellipsoid axes: {}'.format(ellipsoid_info),
'coordinate_system_name = {}'.format(self.expo_layer_crsinfo),
'#',
'# area_shapes:',
#'unit_boundary = {vertex, sub_area, tag, lon, lat',
'{}'.format(self.expo_area_info),
'}',
'#',
'Total_area = {:.13f} <km^2>'.format(self.expo_area_all),
'Total_perimeter = {:.13f} <km>'.format(self.expo_perimeter_all),
'#',
'# crater_diameters:',
'crater = {diam, fraction, lon, lat, topo_scale_factor',
'{}'.format(crater_info)+'}',
]
export_content='\n'.join(header)
with open(self.exportfile, 'w') as output_file:
output_file.write(export_content)
elif self.exportformatindex==1:
# Export diam file
header = [
'# Diam file for Craterstats',
'# Date of measurement export = {}'.format(str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))),
'# {}'.format(self.expo_area_info_diam),
'# Area, <km^2>',
'area = {:.13f}'.format(self.expo_area_all),
'#',
'# crater_diameters:',
'crater = {diam, fraction, lon, lat, topo_scale_factor',