GeoSmoothing

Smoothing GIS features with B-Splines.

Input formats are WKT and SHP.

Builded on top of Numpy, Scipy, Shapely and Fiona.

Examples

Example 1. Rivers.

Example 2. DEM contours.

Install

$ pip install .

Usage

Command Line

WKT smoothing:

$ geosmoothing_wkt [-h] wkt_string

positional arguments:
  wkt_string  Input WKT string to smooth

optional arguments:
  -h, --help  show this help message and exit

Shapefile smoothing:

$ geosmoothing_shp [-h] src_file dst_file

positional arguments:
  src_file    source shapefile path
  dst_file    destiny shapefile path

optional arguments:
  -h, --help  show this help message and exit

Importing module

WKT smoothing:

from geosmoothing.geosmoothing import GeoSmoothing

wkt = "LineString (-5.88785025361041292 36.2403008312793915, -5.94918202938661622 36.05017232637315772, -6.01664698274044163 35.81711157842358517, -5.86945072087755193 35.58405083047400552, -5.40946240255602095 35.52271905469780222, -5.09053716851975935 35.61471671836211073, -5.18253483218406608 35.97044101786408987, -5.44012829044412349 36.27096671916749671, -5.34199744920219644 36.61442466351423519, -4.45268670044723791 36.74935457022188245, -4.4710862331800989 35.92137559724312723, -4.37295539193817184 35.58405083047400552, -4.06629651305715178 35.95817466270885632, -3.94976613908236374 36.29549942947797803, -3.47751146560559299 36.32003213978845935, -3.25058389523363722 36.44882886891848273, -3.46524511045035144 36.76162092537712311, -3.17085258672457204 36.88428447692953682)"

gsm = GeoSmoothing()
res_wkt = gsm.smoothWkt(wkt)

print(res_wkt)

Shapefile smoothing:

from geosmoothing.geosmoothing import GeoSmoothing

src_file = "./data/dem_contours/contour.shp"
dst_file = "/tmp/contour_smt.shp"
gsm = GeoSmoothing()
gsm.smoothShp(src_file, dst_file)

Requirements

Python libraries:

• Numpy: http://www.numpy.org/
• Scipy: http://scipy.org/scipylib/
• Shapely: https://github.com/Toblerity/Shapely
• Fiona: https://github.com/Toblerity/Fiona

Others:

• GDAL library: http://www.gdal.org/
• GEOS library: https://trac.osgeo.org/geos/

About author

Developed by Cayetano Benavent. GIS Analyst at Geographica.

http://www.geographica.gs

License

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.