ost.helpers.vector

Functions

aoi_to_wkt	Helper function to transform various AOI formats into WKT
buffer_shape
difference
epsg_to_wkt_projection	param epsg_code
exterior	Creates an exterior vector of an input vector
gdf_to_json_geometry	Function to parse features from GeoDataFrame in such a manner that rasterio wants them
geodesic_point_buffer	param lat
get_epsg	param prjfile
get_proj4	Get the proj4 string from a projection file of a shapefile
latlon_to_shp	param lon
latlon_to_wkt	A helper function to create a WKT representation of Lat/Lon pair
plot_inventory
reproject_geometry	Reproject a wkt geometry based on EPSG code
set_subset
shp_to_wkt	A helper function to translate a shapefile into WKT
wkt_manipulations	param wkt
wkt_to_gdf	param wkt

ost.helpers.vector.aoi_to_wkt(aoi)

Helper function to transform various AOI formats into WKT

This function is used to import an AOI definition into an OST project. The AOIs definition can be from difffrent sources, i.e. an ISO3 country code (that calls GeoPandas low-resolution country boundaries), a WKT string,

Parameters

aoi (str/Path) – AOI , which can be an ISO3 country code, a WKT String or a path to a shapefile, a GeoPackage or a GeoJSON file

Returns

AOI as WKT string

Return type

WKT string

ost.helpers.vector.buffer_shape(infile, outfile, buffer=None)

ost.helpers.vector.difference(infile1, infile2, outfile)

ost.helpers.vector.epsg_to_wkt_projection(epsg_code)

Parameters

epsg_code –

Returns

ost.helpers.vector.exterior(infile, outfile, buffer=None)

Creates an exterior vector of an input vector

Parameters

• infile –

• outfile –

• buffer –

Returns

ost.helpers.vector.gdf_to_json_geometry(gdf)

Function to parse features from GeoDataFrame in such a manner that rasterio wants them

ost.helpers.vector.geodesic_point_buffer(lon, lat, meters, envelope=False)

Parameters

• lat –

• lon –

• meters –

• envelope –

Returns

ost.helpers.vector.get_epsg(prjfile)

Parameters

prjfile –

Returns

ost.helpers.vector.get_proj4(prjfile)

Get the proj4 string from a projection file of a shapefile

Parameters

prjfile –

Returns

ost.helpers.vector.latlon_to_shp(lon, lat, shapefile)

Parameters

• lon –

• lat –

• shapefile –

Returns

ost.helpers.vector.plot_inventory(aoi, inventory_df, transparency=0.05, annotate=False)

ost.helpers.vector.reproject_geometry(geom, inproj4, out_epsg)

Reproject a wkt geometry based on EPSG code

Parameters

• geom – an ogr geom object

• inproj4 – a proj4 string

• out_epsg – the EPSG code to which the geometry should transformed

Returns

the transformed geometry (ogr-geometry object)

ost.helpers.vector.set_subset(aoi, inventory_df)

ost.helpers.vector.shp_to_wkt(shapefile, buffer=None, convex=False, envelope=False)

A helper function to translate a shapefile into WKT

Parameters

• shapefile –

• buffer –

• convex –

• envelope –

Returns

ost.helpers.vector.wkt_manipulations(wkt, buffer=None, convex=False, envelope=False)

Parameters

• wkt –

• buffer –

• convex –

• envelope –

Returns

ost.helpers.vector.wkt_to_gdf(wkt)

Parameters

wkt –

Returns