fionautil

Utilities for working with geodata with Fiona.

By default, the only prerequisite is Fiona itself.

By default, the package installs without shapely. A small number of functions, marked below, do require shapely. To use these function, install with pip install fionautil[functionname] or just separately install shapely.

Contents

drivers

Tools for fetching the driver name, given a file suffix

• from_file
• From suffix

feature

• field_contains_test (test if a feature's properties has certain key:value pairs)
• togeojson (return a geojson-ready object)
• shapify (requires shapely)
• length (requires shapely)
• compound

geometry

• endpoints (for polyline features)
• startpoint (for polyline features)
• endpoint (for polyline features)
• azimuth (between the start and end of a polyline)
• disjointed
• explodepoints
• explodesegments
• exploderings
• countpoints
• countsegments
• roundgeometry - round all coordinates in a geometry to a given precision

layer

Most of these tools mimic builtin python itertools.

• ffilter
• ffilterfalse
• fmap
• fchain
• freduce
• fslice
• fzip
• length Total length of linear features in a file's native projection or the given Proj object
• meta (returns a layer's meta attribute)
• meta_complete (returns the meta attribute with addional metadata, e.g. bounds)
• bounds (returns a layer's bounds)
• find (return a feature that matches a particular key=value)

measure

• distance (between two coordinates)
• azimuth (between two coordinates)
• signed_area
• clockwise (shortcut for checking if signed_area is >= 0)
• counterclockwise (shortcut for checking if signed_area is < 0)
• azimuth_distance (returns both azimuth and distance between two points)
• intersect (check if two planar line segments intersect)
• onsegment (check if a point lines on a line segment)
• intersectingbounds (check if two bounding boxes intersect)

round

• geometry - round all coordinates in a geometry to a specified precision
• feature

scale

Utilities for scaling a feature or geometry by a given constant. Goes faster with Numpy installed.

• geometry
• scale_rings
• scale - scales a list of coordinates
• feature - scale the geometry of a feature