Python mapnik2.mapnik_version函数代码示例

def serialize(xml, options):
    try:
        try:
            import mapnik2 as mapnik
        except ImportError:
            import mapnik
    except ImportError:
        sys.exit(color_text(1, "Error: saving xml requires Mapnik python bindings to be installed"))
    m = mapnik.Map(1, 1)
    if options.from_string:
        mapnik.load_map_from_string(m, xml, True)
    else:
        mapnik.load_map(m, xml, True)
    if options.output:
        mapnik.save_map(m, options.output)
    else:
        if hasattr(mapnik, "mapnik_version") and mapnik.mapnik_version() >= 700:
            print mapnik.save_map_to_string(m)
        else:
            sys.exit(
                color_text(
                    1,
                    "Minor error: printing XML to stdout requires Mapnik >=0.7.0, please provide a second argument to save the output to a file",
                )
            )

    def render_tile(self, tile_uri, x, y, z):
        # Calculate pixel positions of bottom-left & top-right
        p0 = (x * 256, (y + 1) * 256)
        p1 = ((x + 1) * 256, y * 256)

        # Convert to LatLong (EPSG:4326)
        l0 = self.tileproj.fromPixelToLL(p0, z)
        l1 = self.tileproj.fromPixelToLL(p1, z)

        # Convert to map projection (e.g. mercator co-ords EPSG:900913)
        c0 = self.prj.forward(mapnik.Coord(l0[0], l0[1]))
        c1 = self.prj.forward(mapnik.Coord(l1[0], l1[1]))

        # Bounding box for the tile
        if hasattr(mapnik, "mapnik_version") and mapnik.mapnik_version() >= 800:
            bbox = mapnik.Box2d(c0.x, c0.y, c1.x, c1.y)
        else:
            bbox = mapnik.Envelope(c0.x, c0.y, c1.x, c1.y)
        render_size = 256
        self.m.resize(render_size, render_size)
        self.m.zoom_to_box(bbox)
        self.m.buffer_size = 128

        # Render image with default Agg renderer
        im = mapnik.Image(render_size, render_size)
        mapnik.render(self.m, im)

        # Ensure the tile isn't blank before saving
        if not im.tostring("png") == self.blankTileStr:
            im.save(tile_uri, "png256")
            # Return True if the tile was saved
            return True
        else:
            return False

def render_legend(mapfile, tile_uri):
    m = mapnik.Map(1024, 2048)
    # Load style XML
    mapnik.load_map(m, mapfile, True)
    # Obtain <Map> projection
    prj = mapnik.Projection(m.srs)
    # Projects between tile pixel co-ordinates and LatLong (EPSG:4326)
    tileproj = GoogleProjection(20)

    # Convert to map projection (e.g. mercator co-ords EPSG:900913)
    c0 = prj.forward(mapnik.Coord(14.4503,50.0673))
    c1 = prj.forward(mapnik.Coord(14.457,50.0678))

    # Bounding box for the tile
    if hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 800:
        bbox = mapnik.Box2d(c0.x,c0.y, c1.x,c1.y)
    else:
        bbox = mapnik.Envelope(c0.x,c0.y, c1.x,c1.y)
    render_size_x = 1024
    render_size_y = 1500
    m.resize(render_size_x, render_size_y)
    m.zoom_to_box(bbox)
    m.buffer_size = 128

    # Render image with default Agg renderer
    im = mapnik.Image(render_size_x, render_size_y)
    mapnik.render(m, im)
    im.save(tile_uri, 'png256')

    surface = cairo.SVGSurface('legend.svg', render_size_x, render_size_y)
    mapnik.render(m, surface)
    surface.finish()

    def render_tile(self, x, y, z):
        # Calculate pixel positions of bottom-left & top-right
        p0 = (x * TILE_SIZE, (y + 1) * TILE_SIZE)
        p1 = ((x + 1) * TILE_SIZE, y * TILE_SIZE)

        # Convert to LatLong (EPSG:4326)
        l0 = self.tileproj.fromPixelToLL(p0, z)
        l1 = self.tileproj.fromPixelToLL(p1, z)

        # Convert to map projection (e.g. mercator co-ords EPSG:900913)
        c0 = self.prj.forward(mapnik.Coord(l0[0], l0[1]))
        c1 = self.prj.forward(mapnik.Coord(l1[0], l1[1]))

        # Bounding box for the tile
        if hasattr(mapnik, "mapnik_version") and mapnik.mapnik_version() >= 800:
            bbox = mapnik.Box2d(c0.x, c0.y, c1.x, c1.y)
        else:
            bbox = mapnik.Envelope(c0.x, c0.y, c1.x, c1.y)
        render_size = TILE_SIZE
        self.m.resize(render_size, render_size)
        self.m.zoom_to_box(bbox)
        self.m.buffer_size = 128

        # Render image with default Agg renderer
        im = mapnik.Image(render_size, render_size)
        mapnik.render(self.m, im)
        self.writer.write(x, y, z, im)

    def render_tile(self, tile_uri, x, y, z):
        # Calculate pixel positions of bottom-left & top-right
        p0 = (x * 256, (y + 1) * 256)
        p1 = ((x + 1) * 256, y * 256)

        # Convert to LatLong (EPSG:4326)
        l0 = self.tileproj.fromPixelToLL(p0, z);
        l1 = self.tileproj.fromPixelToLL(p1, z);

        # Convert to map projection (e.g. mercator co-ords EPSG:900913)
        c0 = self.prj.forward(mapnik.Coord(l0[0],l0[1]))
        c1 = self.prj.forward(mapnik.Coord(l1[0],l1[1]))

        # Bounding box for the tile
        if hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 800:
            bbox = mapnik.Box2d(c0.x,c0.y, c1.x,c1.y)
        else:
            bbox = mapnik.Envelope(c0.x,c0.y, c1.x,c1.y)
        render_size = 256
        self.m.resize(render_size, render_size)
        self.m.zoom_to_box(bbox)
        if(self.m.buffer_size < 128):
            self.m.buffer_size = 128

        # Render image with default Agg renderer
        im = mapnik.Image(render_size, render_size)
        mapnik.render(self.m, im)
        im.save(tile_uri, 'png256')

    def generate_map_tile(self, m, filename, z, x, y):
        # Code taken from OSM generate_tiles.py
        proj = GoogleProjection()
        mprj = mapnik.Projection(m.srs)

        p0 = (x * 256, (y + 1) * 256)
        p1 = ((x + 1) * 256, y * 256)
        l0 = proj.fromPixelToLL(p0, z);
        l1 = proj.fromPixelToLL(p1, z);
        c0 = mprj.forward(mapnik.Coord(l0[0], l0[1]))
        c1 = mprj.forward(mapnik.Coord(l1[0], l1[1]))

        if hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 800:
            bbox = mapnik.Box2d(c0.x, c0.y, c1.x, c1.y)
        else:
            bbox = mapnik.Envelope(c0.x, c0.y, c1.x, c1.y)

        m.resize(256, 256)
        m.zoom_to_box(bbox)

        im = mapnik.Image(256, 256)
        mapnik.render(m, im)
        # See https://github.com/mapnik/mapnik/wiki/OutputFormats for output
        # formats and special parameters. The default here is 32 bit PNG with 8
        # bit per component and alpha channel.
        if mapnik_version == 2:
            im.save(str(filename), "png32")
        else:
            im.save(str(filename), "png")

def kml_hex_to_mapnik_color(key_color):
    """Convert a kml color string to a mapnik.Color"""
    c = str(key_color)
    a,b,g,r = tuple(map(lambda s: int(s, 16),(c[:2],c[2:4],c[4:6],c[6:])))
    if mapnik.mapnik_version() >= 800:
        pass #a *= 255
    #print a,b,g,r
    #return (r,g,b)
    return mapnik.Color(r,g,b,a)

 def GetFeatureInfo(self, params, querymethodname='query_point'):
     m = self._buildMap(params)
     if params['info_format'] == 'text/plain':
         writer = TextFeatureInfo()
     elif params['info_format'] == 'text/xml':
         writer = XMLFeatureInfo()
     if params['query_layers'] and params['query_layers'][0] == '__all__':
         for layerindex, layer in enumerate(m.layers):
             featureset = getattr(m, querymethodname)(layerindex, params['i'], params['j'])
             features = featureset.features
             if features:
                 writer.addlayer(layer.name)
                 for feat in features:
                     writer.addfeature()
                     if mapnik_version() >= 800:
                         for prop in feat:
                             writer.addattribute(prop[0], prop[1])                        
                     else:
                         for prop in feat.properties:
                             writer.addattribute(prop[0], prop[1])
     else:
         for layerindex, layername in enumerate(params['query_layers']):
             if layername in params['layers']:
                 # TODO - pretty sure this is bogus, we can't pull from m.layers by the layerindex of the
                 # 'query_layers' subset, need to pull from:
                 # self.mapfactory.layers[layername]
                 if m.layers[layerindex].queryable:
                     featureset = getattr(m, querymethodname)(layerindex, params['i'], params['j'])
                     features = featureset.features
                     if features:
                         writer.addlayer(m.layers[layerindex].name)
                         for feat in features:
                             writer.addfeature()
                             if mapnik_version() >= 800:
                                 for prop in feat:
                                     writer.addattribute(prop[0], prop[1])                        
                             else:
                                 for prop in feat.properties:
                                     writer.addattribute(prop[0], prop[1])
                 else:
                     raise OGCException('Requested query layer "%s" is not marked queryable.' % layername, 'LayerNotQueryable')
             else:
                 raise OGCException('Requested query layer "%s" not in the LAYERS parameter.' % layername)
     return Response(params['info_format'], str(writer))

def render_to_file(mapnik_map,output,format):
    
    # get the full path for a users directory
    if '~' in output:
        output = os.path.expanduser(output)
        
    # mapnik won't create directories so
    # we have to make sure they exist first...
    dirname = os.path.dirname(output)
    if not os.path.exists(dirname):
        os.makedirs(dirname)
    # render out to the desired format
    if format in ('png','png256','jpeg') or (hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 700):
        try:
            mapnik.render_to_file(mapnik_map,output,format)
        except Exception, e:
            return (False,e)            

    def render_tile(self, tile_uri, x, y, z):

        # Calculate pixel positions of bottom-left & top-right
        p0 = (x * 256, (y + 1) * 256)
        p1 = ((x + 1) * 256, y * 256)

        # Convert to LatLong (EPSG:4326)
        l0 = self.tileproj.fromPixelToLL(p0, z);
        l1 = self.tileproj.fromPixelToLL(p1, z);

        # Convert to map projection (e.g. mercator co-ords EPSG:900913)
        c0 = self.prj.forward(mapnik.Coord(l0[0],l0[1]))
        c1 = self.prj.forward(mapnik.Coord(l1[0],l1[1]))

        # Bounding box for the tile
        if hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 800:
            bbox = mapnik.Box2d(c0.x,c0.y, c1.x,c1.y)
        else:
            bbox = mapnik.Envelope(c0.x,c0.y, c1.x,c1.y)
        render_size = 256
        self.m.resize(render_size, render_size)
        self.m.zoom_to_box(bbox)
        self.m.buffer_size = 128

        # Render image with default Agg renderer
        im = mapnik.Image(render_size, render_size)
        mapnik.render(self.m, im)
        im.save(tile_uri, 'png256')
        grid_uri = tile_uri.replace('.png','.grid.json')
        
        # new mapnik.Grid api, works like mapnik.Image
        # with the exception that you can only render one
        # layer to it with the mapnik.render_layer function
        
        # create grid as same size as map/image
        grid = mapnik.Grid(render_size, render_size)
        # render a layer to that grid array
        mapnik.render_layer(self.m,grid,layer=0,fields=['POP2005','NAME'])
        # then encode the grid array as utf, resample to 1/4 the size, and dump features
        grid_utf = grid.encode('utf',resolution=4,add_features=True)
        
        # below is the old grid api - will be removed soon, don't use
        #grid_utf = mapnik.render_grid(self.m,0,key='__id__',resolution=4,fields=['POP2005','NAME'])
        # client code uses jsonp, so fake by wrapping in grid() callback
        open(grid_uri,'wb').write('grid(' + json.dumps(grid_utf) + ')')

def render_image(start_time, end_time):

    ll = (30.708, -27.414, 32.179, -25.652)
    prj = mapnik.Projection("+init=epsg:900913")
    c0 = prj.forward(mapnik.Coord(ll[0], ll[1]))
    c1 = prj.forward(mapnik.Coord(ll[2], ll[3]))

    z = 3
    imgx = 336 * z
    imgy = 450 * z

    m = mapnik.Map(imgx, imgy)
    mapnik.load_map(m, "gpx-nolayer.xml")

    db_params = dict(
        dbname="gpx-merc",
        user="gpx",
        password="gpx",
        host="localhost",
        port=5433,
        estimate_extent=False,
        extent="3390650.221286806, -3163145.87245787, 3609898.596229789, -2956043.104540316",
    )

    lyr = Layer("points", "+init=epsg:900913")
    db_params["table"] = (
        "(select gps_points.geom as geom, gpx_files.gps_name as gps_name from gps_points INNER join gpx_files on gpx_files.id = gps_points.gpx_id where gps_points.timestamp >= '"
        + start_time
        + "' and gps_points.timestamp < '"
        + end_time
        + "') as points"
    )
    lyr.datasource = PostGIS(**db_params)
    lyr.styles.append("points")
    m.layers.append(lyr)

    if hasattr(mapnik, "mapnik_version") and mapnik.mapnik_version() >= 800:
        bbox = mapnik.Box2d(c0.x, c0.y, c1.x, c1.y)
    else:
        bbox = mapnik.Envelope(c0.x, c0.y, c1.x, c1.y)
    m.zoom_to_box(bbox)
    im = mapnik.Image(imgx, imgy)
    mapnik.render(m, im)
    view = im.view(0, 0, imgx, imgy)  # x,y,width,height
    view.save("frames/" + start_time + ".png", "png")

def complexRun(image, stylesheet, extent, size):
	mapfile = stylesheet
    	map_uri = image
	
	imgx = size[0]
	imgy = size[1]

	m = mapnik.Map(imgx,imgy)
	mapnik.load_map(m,mapfile)
	
	if hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 800:
		bbox = mapnik.Box2d(extent[0],extent[2],extent[1],extent[3])
	else:
		bbox = mapnik.Envelope(extent[0],extent[2],extent[1],extent[3])
	m.zoom_to_box(bbox)
	im = mapnik.Image(imgx,imgy)
	mapnik.render(m, im)
	view = im.view(0,0,imgx,imgy) # x,y,width,height
	view.save(map_uri,'png')

def ogc_filter_to_mapnik(ogc_filter):
    if hasattr(ogc_filter,'PropertyIsGreaterThan'):
        prop = ogc_filter.PropertyIsGreaterThan
        operator = '>'
        #cql = "[%s] > %s" % (prop.PropertyName,prop.Literal)
    elif hasattr(ogc_filter,'PropertyIsLessThan'):
        prop = ogc_filter.PropertyIsLessThan
        operator = '<'
    elif hasattr(ogc_filter,'PropertyIsEqualTo'):
        prop = ogc_filter.PropertyIsEqualTo
        operator = '='
    elif hasattr(ogc_filter,'PropertyIsNotEqualTo'):
        prop = ogc_filter.PropertyIsNotEqualTo
        operator = '!='
    if is_number(prop.Literal.text):
        cql = "[%s] %s %s" % (prop.PropertyName,operator,prop.Literal)
    else:
        cql = "[%s] %s '%s'" % (prop.PropertyName,operator,prop.Literal.text)
    if mapnik.mapnik_version() >= 800:
        return mapnik.Expression(str(cql))
    else:
        return mapnik.Filter(str(cql))

    def render_tile(self, tile_uri, x, y, z):
        # Calculate pixel positions of bottom-left & top-right
        p0 = (x * TILES_SIZE, (y + 1) * TILES_SIZE)
        p1 = ((x + 1) * TILES_SIZE, y * TILES_SIZE)

        # Convert to LatLong (EPSG:4326)
        l0 = self.tileproj.fromPixelToLL(p0, z);
        l1 = self.tileproj.fromPixelToLL(p1, z);

        # Convert to map projection (e.g. mercator co-ords EPSG:900913)
        c0 = self.prj.forward(mapnik.Coord(l0[0],l0[1]))
        c1 = self.prj.forward(mapnik.Coord(l1[0],l1[1]))

        # Bounding box for the tile
        if hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 800:
            bbox = mapnik.Box2d(c0.x,c0.y, c1.x,c1.y)
        else:
            bbox = mapnik.Envelope(c0.x,c0.y, c1.x,c1.y)
        render_size = TILES_SIZE
        self.m.resize(render_size, render_size)
        self.m.zoom_to_box(bbox)
        self.m.buffer_size = 128

        if FORMAT == 'grid':
            grid = mapnik.Grid(render_size, render_size)
#            mapnik.render_layer(self.m, grid, layer=64, fields=['name'])
            for n, l in enumerate(self.m.layers):
                if l.name != 'admin-012345678':
                    if 'name' in l.datasource.fields():
                        mapnik.render_layer(self.m, grid, layer=n, fields=['name'])
            utfgrid = grid.encode('utf', resolution=4)
            f = open(tile_uri + '.' + FILE_EXTENSION, 'w')
            f.write(json.dumps(utfgrid))
            f.close()
        else:
            # Render image with default Agg renderer
            im = mapnik.Image(render_size, render_size)
            mapnik.render(self.m, im)
            im.save(tile_uri + '.' + FILE_EXTENSION, FORMAT)

    def generate_map_tile(self, m, filename, z, x, y):
        # Code taken from OSM generate_tiles.py
        proj = GoogleProjection()
        mprj = mapnik.Projection(m.srs)

        p0 = (x * 256, (y + 1) * 256)
        p1 = ((x + 1) * 256, y * 256)
        l0 = proj.fromPixelToLL(p0, z);
        l1 = proj.fromPixelToLL(p1, z);
        c0 = mprj.forward(mapnik.Coord(l0[0], l0[1]))
        c1 = mprj.forward(mapnik.Coord(l1[0], l1[1]))

        if hasattr(mapnik,'mapnik_version') and mapnik.mapnik_version() >= 800:
            bbox = mapnik.Box2d(c0.x, c0.y, c1.x, c1.y)
        else:
            bbox = mapnik.Envelope(c0.x, c0.y, c1.x, c1.y)

        m.resize(256, 256)
        m.zoom_to_box(bbox)

        im = mapnik.Image(256, 256)
        mapnik.render(m, im)
        im.save(str(filename), "png256")