def pnt_func(f):
"For accessing point information."
return double_output(f, [c_void_p, c_int])
def topology_func(f):
f.argtypes = [c_void_p, c_void_p]
f.restype = c_int
f.errchck = check_bool
return f
### OGR_G ctypes function prototypes ###
# GeoJSON routines.
from_json = geom_output(lgdal.OGR_G_CreateGeometryFromJson, [c_char_p])
to_json = string_output(lgdal.OGR_G_ExportToJson, [c_void_p], str_result=True)
to_kml = string_output(lgdal.OGR_G_ExportToKML, [c_void_p, c_char_p], str_result=True)
# GetX, GetY, GetZ all return doubles.
getx = pnt_func(lgdal.OGR_G_GetX)
gety = pnt_func(lgdal.OGR_G_GetY)
getz = pnt_func(lgdal.OGR_G_GetZ)
# Geometry creation routines.
from_wkb = geom_output(lgdal.OGR_G_CreateFromWkb, [c_char_p, c_void_p, POINTER(c_void_p), c_int], offset=-2)
from_wkt = geom_output(lgdal.OGR_G_CreateFromWkt, [POINTER(c_char_p), c_void_p, POINTER(c_void_p)], offset=-1)
create_geom = geom_output(lgdal.OGR_G_CreateGeometry, [c_int])
clone_geom = geom_output(lgdal.OGR_G_Clone, [c_void_p])
get_geom_ref = geom_output(lgdal.OGR_G_GetGeometryRef, [c_void_p, c_int])
get_boundary = geom_output(lgdal.OGR_G_GetBoundary, [c_void_p])
geom_convex_hull = geom_output(lgdal.OGR_G_ConvexHull, [c_void_p])
from_xml = void_output(lgdal.OSRImportFromXML, [c_void_p, c_char_p])
from_user_input = void_output(std_call('OSRSetFromUserInput'), [c_void_p, c_char_p])
# Morphing to/from ESRI WKT.
morph_to_esri = void_output(lgdal.OSRMorphToESRI, [c_void_p])
morph_from_esri = void_output(lgdal.OSRMorphFromESRI, [c_void_p])
# Identifying the EPSG
identify_epsg = void_output(lgdal.OSRAutoIdentifyEPSG, [c_void_p])
# Getting the angular_units, linear_units functions
linear_units = units_func(lgdal.OSRGetLinearUnits)
angular_units = units_func(lgdal.OSRGetAngularUnits)
# For exporting to WKT, PROJ.4, "Pretty" WKT, and XML.
to_wkt = string_output(std_call('OSRExportToWkt'), [c_void_p, POINTER(c_char_p)])
to_proj = string_output(std_call('OSRExportToProj4'), [c_void_p, POINTER(c_char_p)])
to_pretty_wkt = string_output(std_call('OSRExportToPrettyWkt'), [c_void_p, POINTER(c_char_p), c_int], offset=-2)
# Memory leak fixed in GDAL 1.5; still exists in 1.4.
to_xml = string_output(lgdal.OSRExportToXML, [c_void_p, POINTER(c_char_p), c_char_p], offset=-2)
# String attribute retrival routines.
get_attr_value = const_string_output(std_call('OSRGetAttrValue'), [c_void_p, c_char_p, c_int])
get_auth_name = const_string_output(lgdal.OSRGetAuthorityName, [c_void_p, c_char_p])
get_auth_code = const_string_output(lgdal.OSRGetAuthorityCode, [c_void_p, c_char_p])
# SRS Properties
isgeographic = int_output(lgdal.OSRIsGeographic, [c_void_p])
islocal = int_output(lgdal.OSRIsLocal, [c_void_p])
isprojected = int_output(lgdal.OSRIsProjected, [c_void_p])