def loadXML(self, xmlfile=None, strict=False, xmlstring='', basepath=''):
"""Loads and stores a complete map definition in leiu of a set of layers.
Stores an empty style of the same name, which is the only option for rendering.
The map will be rendered as prescribed in the XML."""
config = ConfigParser.SafeConfigParser()
map_wms_srs = None
if self.configpath:
config.readfp(open(self.configpath))
if config.has_option('map', 'wms_srs'):
map_wms_srs = config.get('map', 'wms_srs')
tmp_map = Map(0,0)
if xmlfile:
load_map(tmp_map, xmlfile, strict)
elif xmlstring:
load_map_from_string(tmp_map, xmlstring, strict, basepath)
else:
raise ServerConfigurationError("Mapnik configuration XML is not specified - 'xmlfile' and 'xmlstring' variables are empty.\
Please set one of this variables to load mapnik map object.")
# parse map level attributes
if tmp_map.background:
self.map_attributes['bgcolor'] = tmp_map.background
if tmp_map.buffer_size:
self.map_attributes['buffer_size'] = tmp_map.buffer_size
if xmlfile is None :
# Map objects have no name, so just call it default.
layer_name = 'default'
else :
# The layer name is the basename of the xml file or the
# whole file name
layer_name = xmlfile
fname_match = re.match('([A-Za-z0-9_\-\.]+).xml', xmlfile)
if fname_match is not None :
layer_name = fname_match.group(1)
else :
layer_name = xmlfile
style_name = layer_name
style_obj = Style()
# Make the map have attributes expected of layers
tmp_map.name = layer_name
map_p = common.Projection(tmp_map.srs)
if map_wms_srs is None :
tmp_map.wms_srs = map_p.epsgstring()
else :
tmp_map.wms_srs = map_wms_srs
tmp_map.queryable = False
# set map extent from config file.
geog_coords = config.get('map','wms_extent').split(',')
geog_box = Box2d(float(geog_coords[0]), float(geog_coords[1]), float(geog_coords[2]), float(geog_coords[3]))
proj_box = geog_box.forward(map_p)
tmp_map.zoom_to_box(proj_box)
tmp_map.maximum_extent = proj_box
self.register_style(style_name, style_obj)
self.register_layer(tmp_map, style_name)
