gnome.utilities.geometry.geo_routines

Attributes

geod

Functions

geo_area_of_polygon(poly)
triangulate_poly(poly)
poly_area_weight(polys[, geo_area])
mixed_polys_to_polygon(polys)
check_valid_polygon(poly)	checks that a shapely Polygon object at least has valid values for coordinates
random_pt_in_tri(tri)
load_shapefile(filename[, transform_crs])	Use GeoPandas to load up a shapefile into a FeatureCollection

Module Contents

gnome.utilities.geometry.geo_routines.geod

gnome.utilities.geometry.geo_routines.geo_area_of_polygon(poly)

Parameters:

poly (shapely or geojson MultiPolygon or Polygon)

Returns:

area of polygon in m^2

gnome.utilities.geometry.geo_routines.triangulate_poly(poly)

Parameters:

poly – shapely or geojson MultiPolygon or Polygon

Returns:

list of shapely.Polygon (triangles)

gnome.utilities.geometry.geo_routines.poly_area_weight(polys, geo_area=False)

Parameters:

• polys – iterable of shapely.Polygon

• geo_area – If true, calculates using geo area (slower, more accurate)

gnome.utilities.geometry.geo_routines.mixed_polys_to_polygon(polys)

Parameters:

polys – iterable containing mixed Polygon and MultiPolygon

Returns:

iterable of shapely.Polygon

gnome.utilities.geometry.geo_routines.check_valid_polygon(poly)

checks that a shapely Polygon object at least has valid values for coordinates

gnome.utilities.geometry.geo_routines.random_pt_in_tri(tri)

gnome.utilities.geometry.geo_routines.load_shapefile(filename, transform_crs=True)

Use GeoPandas to load up a shapefile into a FeatureCollection

Parameters:

• filename – string path of a zip file

• transform_crs – attempts to read the .prj file if any and convert to EPSG:4326

Returns:

geojson.FeatureCollection