def __init__(self, obj, band=1, style=None):
self._rstore = obj
layer = mapnik.Layer(str(obj), srs.SpatialReference(obj.srs).proj4)
layer.datasource = mapnik.Gdal(file=obj.image.path, band=band)
self._layer = layer
self.stylename = style or 'Spectral_r'
self._symbolizer = None
def __init__(self, queryset, style=None):
table = str(queryset.model._meta.db_table)
field = query.geo_field(queryset)
sref = srs.SpatialReference(query.get_srid(queryset))
layer = mapnik.Layer(table, sref.proj4)
layer.datasource = make_dbsource(
table=table, geometry_field=field.name)
self._layer = layer
self.stylename = style or self._layer.name
self._symbolizer = None
def __init__(self, queryset, style=None):
table = str(queryset.model._meta.db_table)
field = query.geo_field(queryset)
sref = srs.SpatialReference(query.get_srid(queryset))
layer = mapnik.Layer(table, sref.proj4)
ds = make_dbsource(table=table, geometry_field=field.name)
# During tests, the spatialite layer statistics are not updated and
# return an invalid layer extent. Set it from the queryset.
if not ds.envelope().valid():
ex = ','.join(map(str, queryset.extent()))
ds = make_dbsource(table=table,
geometry_field=field.name,
extent=ex)
layer.datasource = ds
self._layer = layer
self.stylename = style or self._layer.name
self._symbolizer = None
def __init__(self, obj, band=1, style='Spectral_r'):
layer = mapnik.Layer(str(obj), srs.SpatialReference(obj.srs).proj4)
layer.datasource = mapnik.Gdal(file=obj.image.path, band=band)
self._layer = layer
self.stylename = style