# -*- coding: utf-8 -*-
from openelevationservice.server.api.api_exceptions import InvalidUsage
from openelevationservice.server.utils import logger
from shapely.geometry import shape, LineString, Point
log = logger.get_logger(__name__)
def geojson_to_geometry(geometry_str):
"""
Converts GeoJSON to shapely geometries
:param geometry_str: GeoJSON representation to be converted
:type geometry_str: str
:raises InvalidUsage: internal HTTP 500 error with more detailed description.
:returns: Shapely geometry
:rtype: Shapely geometry
"""
try:
geom = shape(geometry_str)
except Exception as e:
raise InvalidUsage(status_code=400,
error_code=4002,
message=str(e))
return geom
def point_to_geometry(point):
"""
Converts a point to shapely Point geometries
:param point: coordinates of a point
:type point: list/tuple
:raises InvalidUsage: internal HTTP 500 error with more detailed description.
:returns: Point
:rtype: shapely.geometry.Point
"""
try:
geom = Point(point)
except Exception as e:
raise InvalidUsage(status_code=400,
error_code=4002,
message=str(e))
return geom
def polyline_to_geometry(point_list):
"""
Converts a list/tuple of coordinates lists/tuples to a shapely LineString.
:param point_list: Coordinates of line to be converted.
:type point_list: list/tuple of lists/tuples
:raises InvalidUsage: internal HTTP 500 error with more detailed description.
:returns: LineString
:rtype: shapely.geometry.LineString
"""
try:
geom = LineString(point_list)
except Exception as e:
raise InvalidUsage(status_code=400,
error_code=4002,
message=str(e))
return geom
