def get_wdb_boundaries(resolution,level,rivers=False):
polymeta = []; polybounds = []
if rivers:
filename = 'WDBII_shp/%s/WDBII_river_%s_L%02i' % (resolution, resolution, level)
else:
filename = 'WDBII_shp/%s/WDBII_border_%s_L%s' % (resolution, resolution, level)
print filename
shf = Reader(filename)
fields = shf.fields
for shprec in shf.shapeRecords():
shp = shprec.shape; rec = shprec.record
parts = shp.parts.tolist()
if parts != [0]:
print 'multipart polygon'
raise SystemExit
verts = shp.points
lons, lats = list(zip(*verts))
north = max(lats); south = min(lats)
attdict={}
for r,key in zip(rec,fields[1:]):
attdict[key[0]]=r
area = -1
id = attdict['id']
polymeta.append([-1,-1,south,north,len(lons),id])
b = np.empty((len(lons),2),np.float32)
b[:,0] = lons; b[:,1] = lats
if lsd is not None:
b = quantize(b,lsd)
polybounds.append(b)
return polybounds, polymeta
def get_coast_polygons(resolution):
polymeta = []; polybounds = []
for level in [1,2,3,4]:
filename = 'GSHHS_shp/%s/GSHHS_%s_L%s' % (resolution, resolution, level)
#filename = 'WDBII_shp/%s/WDBII_border_%s_L%s' % (resolution, resolution, level)
print filename
shf = Reader(filename)
fields = shf.fields
try:
shf.shapeRecords()
except:
continue
for shprec in shf.shapeRecords():
shp = shprec.shape; rec = shprec.record
parts = shp.parts.tolist()
if parts != [0]:
print 'multipart polygon'
raise SystemExit
verts = shp.points
lons, lats = list(zip(*verts))
north = max(lats); south = min(lats)
attdict={}
for r,key in zip(rec,fields[1:]):
attdict[key[0]]=r
area = attdict['area']
id = attdict['id']
polymeta.append([level,area,south,north,len(lons),id])
b = np.empty((len(lons),2),np.float32)
b[:,0] = lons; b[:,1] = lats
if lsd is not None:
b = quantize(b,lsd)
polybounds.append(b)
return polybounds, polymeta
def shapefile2data(shapefile, countries=False):
shf = ShapeReader(shapefile)
fields = [f[0] for f in shf.fields if isinstance(f, list)]
latlons = None
if countries and 'LAT' not in fields or 'LON' not in fields:
with open(join(dirname(abspath(__file__)), 'data', 'latlons.json')) as fh:
latlons = json.load(fh)
records = []
iso2s = set()
for record in shf.shapeRecords():
datadict = dict(zip(fields, record.record))
if countries:
iso2 = datadict['ISO_A2']
iso2s.add(iso2)
if latlons is not None and iso2 in latlons:
lat, lon = latlons[iso2]
datadict['LAT'] = lat
datadict['LON'] = lon
datadict['SHAPE'] = [record.shape]
records.append(datadict)
if countries:
for iso2, latlon in latlons.items():
if iso2 in iso2s:
continue
lat, lon = latlon
datadict = { 'ISO_A2': iso2, 'LAT': lat, 'LON': lon }
records.append(datadict)
return records
def get_coast_polygons(resolution):
polymeta = []
polybounds = []
for level in [1, 2, 3, 4]:
filename = 'GSHHS_shp/%s/GSHHS_%s_L%s' % (resolution, resolution,
level)
#filename = 'WDBII_shp/%s/WDBII_border_%s_L%s' % (resolution, resolution, level)
print filename
shf = Reader(filename)
fields = shf.fields
try:
shf.shapeRecords()
except:
continue
for shprec in shf.shapeRecords():
shp = shprec.shape
rec = shprec.record
parts = shp.parts.tolist()
if parts != [0]:
print 'multipart polygon'
raise SystemExit
verts = shp.points
lons, lats = list(zip(*verts))
north = max(lats)
south = min(lats)
attdict = {}
for r, key in zip(rec, fields[1:]):
attdict[key[0]] = r
area = attdict['area']
id = attdict['id']
polymeta.append([level, area, south, north, len(lons), id])
b = np.empty((len(lons), 2), np.float32)
b[:, 0] = lons
b[:, 1] = lats
if lsd is not None:
b = quantize(b, lsd)
polybounds.append(b)
return polybounds, polymeta
def get_wdb_boundaries(resolution, level, rivers=False):
polymeta = []
polybounds = []
if rivers:
filename = 'WDBII_shp/%s/WDBII_river_%s_L%02i' % (resolution,
resolution, level)
else:
filename = 'WDBII_shp/%s/WDBII_border_%s_L%s' % (resolution,
resolution, level)
print filename
shf = Reader(filename)
fields = shf.fields
for shprec in shf.shapeRecords():
shp = shprec.shape
rec = shprec.record
parts = shp.parts.tolist()
if parts != [0]:
print 'multipart polygon'
raise SystemExit
verts = shp.points
lons, lats = list(zip(*verts))
north = max(lats)
south = min(lats)
attdict = {}
for r, key in zip(rec, fields[1:]):
attdict[key[0]] = r
area = -1
id = attdict['id']
polymeta.append([-1, -1, south, north, len(lons), id])
b = np.empty((len(lons), 2), np.float32)
b[:, 0] = lons
b[:, 1] = lats
if lsd is not None:
b = quantize(b, lsd)
polybounds.append(b)
return polybounds, polymeta