300 lines
10 KiB
Python
Executable File
300 lines
10 KiB
Python
Executable File
#
|
|
# jVectorMap version 2.0.4
|
|
#
|
|
# Copyright 2011-2013, Kirill Lebedev
|
|
#
|
|
|
|
import sys
|
|
import shapely.geometry
|
|
import shapely.wkb
|
|
import shapely.affinity
|
|
from osgeo import ogr
|
|
from osgeo import osr
|
|
import json
|
|
import codecs
|
|
import copy
|
|
|
|
class Map:
|
|
def __init__(self, name, language):
|
|
self.paths = {}
|
|
self.name = name
|
|
self.language = language
|
|
self.width = 0
|
|
self.height = 0
|
|
self.bbox = []
|
|
|
|
def addPath(self, path, code, name):
|
|
self.paths[code] = {"path": path, "name": name}
|
|
|
|
def getJSCode(self):
|
|
map = {"paths": self.paths, "width": self.width, "height": self.height, "insets": self.insets, "projection": self.projection}
|
|
return "jQuery.fn.vectorMap('addMap', '"+self.name+"_"+self.projection['type']+"_"+self.language+"',"+json.dumps(map)+');'
|
|
|
|
|
|
class Converter:
|
|
def __init__(self, config):
|
|
args = {
|
|
'buffer_distance': -0.4,
|
|
'simplify_tolerance': 0.2,
|
|
'longitude0': 0,
|
|
'projection': 'mill',
|
|
'name': 'world',
|
|
'width': 900,
|
|
'language': 'en',
|
|
'precision': 2,
|
|
'insets': []
|
|
}
|
|
args.update(config)
|
|
|
|
self.map = Map(args['name'], args.get('language'))
|
|
|
|
if args.get('sources'):
|
|
self.sources = args['sources']
|
|
else:
|
|
self.sources = [{
|
|
'input_file': args.get('input_file'),
|
|
'where': args.get('where'),
|
|
'name_field': args.get('name_field'),
|
|
'code_field': args.get('code_field'),
|
|
'input_file_encoding': args.get('input_file_encoding')
|
|
}]
|
|
|
|
default_source = {
|
|
'where': '',
|
|
'name_field': 0,
|
|
'code_field': 1,
|
|
'input_file_encoding': 'iso-8859-1'
|
|
}
|
|
|
|
for index in range(len(self.sources)):
|
|
for key in default_source:
|
|
if self.sources[index].get(key) is None:
|
|
self.sources[index][key] = default_source[key]
|
|
|
|
self.features = {}
|
|
self.width = args.get('width')
|
|
self.minimal_area = args.get('minimal_area')
|
|
self.longitude0 = float(args.get('longitude0'))
|
|
self.projection = args.get('projection')
|
|
self.precision = args.get('precision')
|
|
self.buffer_distance = args.get('buffer_distance')
|
|
self.simplify_tolerance = args.get('simplify_tolerance')
|
|
self.for_each = args.get('for_each')
|
|
self.emulate_longitude0 = args.get('emulate_longitude0')
|
|
if args.get('emulate_longitude0') is None and (self.projection == 'merc' or self.projection =='mill') and self.longitude0 != 0:
|
|
self.emulate_longitude0 = True
|
|
|
|
if args.get('viewport'):
|
|
self.viewport = map(lambda s: float(s), args.get('viewport').split(' '))
|
|
else:
|
|
self.viewport = False
|
|
|
|
# spatial reference to convert to
|
|
self.spatialRef = osr.SpatialReference()
|
|
projString = '+proj='+str(self.projection)+' +a=6381372 +b=6381372 +lat_0=0'
|
|
if not self.emulate_longitude0:
|
|
projString += ' +lon_0='+str(self.longitude0)
|
|
self.spatialRef.ImportFromProj4(projString)
|
|
|
|
# handle map insets
|
|
if args.get('insets'):
|
|
self.insets = args.get('insets')
|
|
else:
|
|
self.insets = []
|
|
|
|
def loadData(self):
|
|
for sourceConfig in self.sources:
|
|
self.loadDataSource( sourceConfig )
|
|
|
|
def loadDataSource(self, sourceConfig):
|
|
source = ogr.Open( sourceConfig['input_file'] )
|
|
layer = source.GetLayer(0)
|
|
layer.SetAttributeFilter( sourceConfig['where'].encode('ascii') )
|
|
self.viewportRect = False
|
|
|
|
transformation = osr.CoordinateTransformation( layer.GetSpatialRef(), self.spatialRef )
|
|
if self.viewport:
|
|
layer.SetSpatialFilterRect( *self.viewport )
|
|
point1 = transformation.TransformPoint(self.viewport[0], self.viewport[1])
|
|
point2 = transformation.TransformPoint(self.viewport[2], self.viewport[3])
|
|
self.viewportRect = shapely.geometry.box(point1[0], point1[1], point2[0], point2[1])
|
|
|
|
layer.ResetReading()
|
|
|
|
codes = {}
|
|
|
|
if self.emulate_longitude0:
|
|
meridian = -180 + self.longitude0
|
|
p1 = transformation.TransformPoint(-180, 89)
|
|
p2 = transformation.TransformPoint(meridian, -89)
|
|
left = shapely.geometry.box(p1[0], p1[1], p2[0], p2[1])
|
|
p3 = transformation.TransformPoint(meridian, 89)
|
|
p4 = transformation.TransformPoint(180, -89)
|
|
right = shapely.geometry.box(p3[0], p3[1], p4[0], p4[1])
|
|
|
|
# load features
|
|
nextCode = 0
|
|
for feature in layer:
|
|
geometry = feature.GetGeometryRef()
|
|
geometryType = geometry.GetGeometryType()
|
|
|
|
if geometryType == ogr.wkbPolygon or geometryType == ogr.wkbMultiPolygon:
|
|
geometry.TransformTo( self.spatialRef )
|
|
shapelyGeometry = shapely.wkb.loads( geometry.ExportToWkb() )
|
|
if not shapelyGeometry.is_valid:
|
|
shapelyGeometry = shapelyGeometry.buffer(0, 1)
|
|
|
|
if self.emulate_longitude0:
|
|
leftPart = shapely.affinity.translate(shapelyGeometry.intersection(left), p4[0] - p3[0])
|
|
rightPart = shapely.affinity.translate(shapelyGeometry.intersection(right), p1[0] - p2[0])
|
|
shapelyGeometry = leftPart.buffer(0.1, 1).union(rightPart.buffer(0.1, 1)).buffer(-0.1, 1)
|
|
|
|
if not shapelyGeometry.is_valid:
|
|
shapelyGeometry = shapelyGeometry.buffer(0, 1)
|
|
shapelyGeometry = self.applyFilters(shapelyGeometry)
|
|
if shapelyGeometry:
|
|
name = feature.GetFieldAsString(str(sourceConfig.get('name_field'))).decode(sourceConfig.get('input_file_encoding'))
|
|
code = feature.GetFieldAsString(str(sourceConfig.get('code_field'))).decode(sourceConfig.get('input_file_encoding'))
|
|
if code in codes:
|
|
code = '_' + str(nextCode)
|
|
nextCode += 1
|
|
codes[code] = name
|
|
self.features[code] = {"geometry": shapelyGeometry, "name": name, "code": code}
|
|
else:
|
|
raise Exception, "Wrong geometry type: "+geometryType
|
|
|
|
|
|
def convert(self, outputFile):
|
|
print 'Generating '+outputFile
|
|
|
|
self.loadData()
|
|
|
|
codes = self.features.keys()
|
|
main_codes = copy.copy(codes)
|
|
self.map.insets = []
|
|
envelope = []
|
|
for inset in self.insets:
|
|
insetBbox = self.renderMapInset(inset['codes'], inset['left'], inset['top'], inset['width'])
|
|
insetHeight = (insetBbox[3] - insetBbox[1]) * (inset['width'] / (insetBbox[2] - insetBbox[0]))
|
|
self.map.insets.append({
|
|
"bbox": [{"x": insetBbox[0], "y": -insetBbox[3]}, {"x": insetBbox[2], "y": -insetBbox[1]}],
|
|
"left": inset['left'],
|
|
"top": inset['top'],
|
|
"width": inset['width'],
|
|
"height": insetHeight
|
|
})
|
|
envelope.append(
|
|
shapely.geometry.box(
|
|
inset['left'], inset['top'], inset['left'] + inset['width'], inset['top'] + insetHeight
|
|
)
|
|
)
|
|
for code in inset['codes']:
|
|
main_codes.remove(code)
|
|
|
|
insetBbox = self.renderMapInset(main_codes, 0, 0, self.width)
|
|
insetHeight = (insetBbox[3] - insetBbox[1]) * (self.width / (insetBbox[2] - insetBbox[0]))
|
|
|
|
envelope.append( shapely.geometry.box( 0, 0, self.width, insetHeight ) )
|
|
mapBbox = shapely.geometry.MultiPolygon( envelope ).bounds
|
|
|
|
self.map.width = mapBbox[2] - mapBbox[0]
|
|
self.map.height = mapBbox[3] - mapBbox[1]
|
|
self.map.insets.append({
|
|
"bbox": [{"x": insetBbox[0], "y": -insetBbox[3]}, {"x": insetBbox[2], "y": -insetBbox[1]}],
|
|
"left": 0,
|
|
"top": 0,
|
|
"width": self.width,
|
|
"height": insetHeight
|
|
})
|
|
self.map.projection = {"type": self.projection, "centralMeridian": float(self.longitude0)}
|
|
|
|
open(outputFile, 'w').write( self.map.getJSCode() )
|
|
|
|
if self.for_each is not None:
|
|
for code in codes:
|
|
childConfig = copy.deepcopy(self.for_each)
|
|
for param in ('input_file', 'output_file', 'where', 'name'):
|
|
childConfig[param] = childConfig[param].replace('{{code}}', code.lower())
|
|
converter = Converter(childConfig)
|
|
converter.convert(childConfig['output_file'])
|
|
|
|
def renderMapInset(self, codes, left, top, width):
|
|
envelope = []
|
|
for code in codes:
|
|
envelope.append( self.features[code]['geometry'].envelope )
|
|
|
|
bbox = shapely.geometry.MultiPolygon( envelope ).bounds
|
|
|
|
scale = (bbox[2]-bbox[0]) / width
|
|
|
|
# generate SVG paths
|
|
for code in codes:
|
|
feature = self.features[code]
|
|
geometry = feature['geometry']
|
|
if self.buffer_distance:
|
|
geometry = geometry.buffer(self.buffer_distance*scale, 1)
|
|
if geometry.is_empty:
|
|
continue
|
|
if self.simplify_tolerance:
|
|
geometry = geometry.simplify(self.simplify_tolerance*scale, preserve_topology=True)
|
|
if isinstance(geometry, shapely.geometry.multipolygon.MultiPolygon):
|
|
polygons = geometry.geoms
|
|
else:
|
|
polygons = [geometry]
|
|
path = ''
|
|
for polygon in polygons:
|
|
rings = []
|
|
rings.append(polygon.exterior)
|
|
rings.extend(polygon.interiors)
|
|
for ring in rings:
|
|
for pointIndex in range( len(ring.coords) ):
|
|
point = ring.coords[pointIndex]
|
|
if pointIndex == 0:
|
|
path += 'M'+str( round( (point[0]-bbox[0]) / scale + left, self.precision) )
|
|
path += ','+str( round( (bbox[3] - point[1]) / scale + top, self.precision) )
|
|
else:
|
|
path += 'l' + str( round(point[0]/scale - ring.coords[pointIndex-1][0]/scale, self.precision) )
|
|
path += ',' + str( round(ring.coords[pointIndex-1][1]/scale - point[1]/scale, self.precision) )
|
|
path += 'Z'
|
|
self.map.addPath(path, feature['code'], feature['name'])
|
|
return bbox
|
|
|
|
|
|
def applyFilters(self, geometry):
|
|
if self.viewportRect:
|
|
geometry = self.filterByViewport(geometry)
|
|
if not geometry:
|
|
return False
|
|
if self.minimal_area:
|
|
geometry = self.filterByMinimalArea(geometry)
|
|
if not geometry:
|
|
return False
|
|
return geometry
|
|
|
|
|
|
def filterByViewport(self, geometry):
|
|
try:
|
|
return geometry.intersection(self.viewportRect)
|
|
except shapely.geos.TopologicalError:
|
|
return False
|
|
|
|
|
|
def filterByMinimalArea(self, geometry):
|
|
if isinstance(geometry, shapely.geometry.multipolygon.MultiPolygon):
|
|
polygons = geometry.geoms
|
|
else:
|
|
polygons = [geometry]
|
|
polygons = filter(lambda p: p.area > self.minimal_area, polygons)
|
|
return shapely.geometry.multipolygon.MultiPolygon(polygons)
|
|
|
|
|
|
args = {}
|
|
if len(sys.argv) > 1:
|
|
paramsJson = open(sys.argv[1], 'r').read()
|
|
else:
|
|
paramsJson = sys.stdin.read()
|
|
paramsJson = json.loads(paramsJson)
|
|
|
|
converter = Converter(paramsJson)
|
|
converter.convert(paramsJson['output_file'])
|