Welcome to Safecast interpolation tools¶ ↑

Application details¶ ↑

Create static prefectures or cities map with Safecast interpolated radiation measurements.

Requirements¶ ↑

• python 2.6

• matplotlib, basemap

• scipy, numpy

• Shapely

• psyco (for faster processing)

Install Project¶ ↑

Matplotlib and basemap¶ ↑

• matplotlib.github.com/

• matplotlib.github.com/basemap/

scipy and numpy¶ ↑

• www.scipy.org/

• numpy.scipy.org/

Shapely¶ ↑

• github.com/sgillies/shapely

Shapefile maps¶ ↑

Administrative boundaries and placenames of Japan:

• cegrp.cga.harvard.edu/japan/?q=category/tags/vector-gis

The shapefiles need to be uncompressed in the data/ folder

Usage¶ ↑

Preprocessing¶ ↑

Precompute the griddata interpolation

Usage:

> python safecastPrecompute.py --help
Usage: safecastPrecompute [options] <safecast-csv-file>

Options:
  -h, --help            show this help message and exit
  -c CLIP, --clip=CLIP  specify the clipping value in CPM
  -g GRIDSIZE, --gridsize=GRIDSIZE
                        specify the grid size for interpolation

Sample usage:

> python safecastPrecompute.py F_100m.csv -g 2500
129416 measurements loaded.
Compute area with missing data
Create the grid
Calculate the griddata (2500 x 2500)
done in 60.41 seconds.
Griddata saved (safecast.pickle).

Rendering maps¶ ↑

Usage:

> python safecastGridMaps.py --help 
Usage: safecastGridMaps [options] <safecast-pickle>

Options:
  -h, --help       show this help message and exit
  -c, --cities     render the cities maps (default is prefectures)
  -s, --sieverts   render the maps using uSv/h data (default in CPM)
  -u, --uncovered  add uncovered yellow area to the map (default is none)

Sample usage:

> python safecastGridMaps.py -s safecast.pickle
Pickle file loaded (129416 points)
Rendering using uSv/h as unit
Load locations
Processing shapes ...
Generating map for Fukushima - All (53508 points) [37.973683,139.168044 - 36.792610,141.046189]
...

The rendered maps are saved in SafecastMap/ folder

Rendering tiles¶ ↑

For trial you can use the small server that will render and cache the tiles on the fly

> cd safemaps/tiles
> python server.py
The server is ready and can be accessed it at http://localhost:8888/index.html

Then the rendering of all tiles can be done using the prebuildtiles command

safemaps/tiles/renderer> python prebuildtiles.py
Zoom level 4
Building tile ./interpolate.py 14 5 4 1
Building tile ./interpolate.py 14 6 4 1
Zoom level 5
Building tile ./interpolate.py 28 11 5 1
Building tile ./interpolate.py 28 12 5 1
Zoom level 6
Building tile ./interpolate.py 56 23 6 2
Building tile ./interpolate.py 56 24 6 2
Building tile ./interpolate.py 56 25 6 2
...

License¶ ↑

The Safecast interpolation tools are released under the CC0 license. See CC0.txt for details.