Geometric Operations
Using shapely operations inside mundi.py
Common Shapely Operations
Boolean operations
These shapely operations can be used in conditionals.
Shape generators
These methods create a new shapely geometry based on the relationship between the passed geometries.
Shape modifiers
These methods return a modified version of object after a transformation.
Properties
These properties are defined on all shapely geometries.
length and area use units of meters and square meters when appropriate.Methods
Calculate a result based on two geometries.
Invalid Geometries
Mundipy gracefully resolves invalid geometries during spatial operations
with the shapely.make_valid method. This means datasets require no
pre-processing for spatial operations.
Many real-world datasets encode geometries with invalid sets of points. This triggers errors like the following in LibGEOS:
GEOSException: TopologyException: Input geom 1 is invalid: Ring Self-intersection
Validating an entire dataset pre-emptively with .buffer(0) or shapely.make_valid
is an expensive preprocessing step. Mundipy avoids this by catching GEOSException
in spatial operations and automatically re-trying the operation with a valid geometry.