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_1_Graticule.py
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#Copyright (C) 2016, 2017 Drazen Tutic, Tomislav Jogun, Ana Kuvezdic Divjak
#This file is part of OSMPoliticalMap software.
#
#OSMPoliticalMap is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.
#
#OSMPoliticalMap is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with OSMPoliticalMap. If not, see <http://www.gnu.org/licenses/>.
# create graticule for the whole world
# USAGE: python _1_Graticule.py step density lang
# "step" is integer distance between meridians and parallels
# "density" is float distance between vertices in meridians and paralles
# output will be in directory NEW_MAP/01_graticule with shapefiles frame_final.shp, meridians_final.shp, parallels_final.shp, tropics_final.shp
import ogr, osr, sys, os
step = int(sys.argv[1])
density = float(sys.argv[2])
lang_name = 'name_'+sys.argv[3]
driver = ogr.GetDriverByName('ESRI Shapefile')
# create the spatial reference, WGS84
srs = osr.SpatialReference()
srs.ImportFromEPSG(4326)
#set relative path of output folder
folder = './01_graticule/'
#create output directory
if not os.path.exists(folder):
os.makedirs(folder)
# MERIDIANS
# create the output layer
outputShapefile = folder+'meridians_wgs84.shp'
if os.path.exists(outputShapefile):
driver.DeleteDataSource(outputShapefile)
outDataSet = driver.CreateDataSource(outputShapefile)
outLayer = outDataSet.CreateLayer('meridians', srs, geom_type=ogr.wkbLineString, options=['ENCODING=UTF8'])
# Add the field for longitude label
outLayer.CreateField(ogr.FieldDefn('longitude', ogr.OFTInteger))
# get the output layer's feature definition
outLayerDefn = outLayer.GetLayerDefn()
for lon in range(-180,180+1):
if lon % step == 0:
line = ogr.Geometry(ogr.wkbLineString)
lat = -90
line.AddPoint(lon, lat)
while lat < 90 - density:
lat = lat + density
line.AddPoint(lon, lat)
lat = 90
line.AddPoint(lon, lat)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(line)
outFeature.SetField('longitude', lon)
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
# close the shapefile
outDataSet.Destroy()
# PARALLELS
# create the output layer
outputShapefile = folder+'parallels_wgs84.shp'
if os.path.exists(outputShapefile):
driver.DeleteDataSource(outputShapefile)
outDataSet = driver.CreateDataSource(outputShapefile)
outLayer = outDataSet.CreateLayer('parallels', srs, geom_type=ogr.wkbLineString, options=['ENCODING=UTF8'])
# Add the field for longitude label
outLayer.CreateField(ogr.FieldDefn('latitude', ogr.OFTInteger))
# get the output layer's feature definition
outLayerDefn = outLayer.GetLayerDefn()
for lat in range(-90,90+1):
if lat % step == 0:
line = ogr.Geometry(ogr.wkbLineString)
lon = -180
line.AddPoint(lon, lat)
while lon < 180 - density:
lon = lon + density
line.AddPoint(lon, lat)
lon = 180
line.AddPoint(lon, lat)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(line)
outFeature.SetField('latitude', lat)
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
# close the shapefile
outDataSet.Destroy()
# TROPICS
# create the output layer
outputShapefile = folder+'tropics_wgs84.shp'
if os.path.exists(outputShapefile):
driver.DeleteDataSource(outputShapefile)
outDataSet = driver.CreateDataSource(outputShapefile)
outLayer = outDataSet.CreateLayer('tropics', srs, geom_type=ogr.wkbLineString, options=['ENCODING=UTF8'])
# Add the field for longitude label
field_name = ogr.FieldDefn(lang_name, ogr.OFTString)
field_name.SetWidth(30)
outLayer.CreateField(field_name)
# get the output layer's feature definition
outLayerDefn = outLayer.GetLayerDefn()
#Antarctic Circle
lat = -66.56083
line = ogr.Geometry(ogr.wkbLineString)
lon = -180
line.AddPoint(lon, lat)
while lon < 180 - density:
lon = lon + density
line.AddPoint(lon, lat)
lon = 180
line.AddPoint(lon, lat)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(line)
outFeature.SetField(lang_name, 'Antarctic Circle')
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
#Tropic of Capricorn
lat = -23.45
line = ogr.Geometry(ogr.wkbLineString)
lon = -180
line.AddPoint(lon, lat)
while lon < 180 - density:
lon = lon + density
line.AddPoint(lon, lat)
lon = 180
line.AddPoint(lon, lat)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(line)
outFeature.SetField(lang_name, 'Tropic of Capricorn')
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
#Equator
lat = 0
line = ogr.Geometry(ogr.wkbLineString)
lon = -180
line.AddPoint(lon, lat)
while lon < 180 - density:
lon = lon + density
line.AddPoint(lon, lat)
lon = 180
line.AddPoint(lon, lat)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(line)
outFeature.SetField(lang_name, 'Equator')
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
#Tropic of Cancer
lat = 23.45
line = ogr.Geometry(ogr.wkbLineString)
lon = -180
line.AddPoint(lon, lat)
while lon < 180 - density:
lon = lon + density
line.AddPoint(lon, lat)
lon = 180
line.AddPoint(lon, lat)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(line)
outFeature.SetField(lang_name, 'Tropic of Cancer')
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
#Arctic Circle
lat = 66.56083
line = ogr.Geometry(ogr.wkbLineString)
lon = -180
line.AddPoint(lon, lat)
while lon < 180 - density:
lon = lon + density
line.AddPoint(lon, lat)
lon = 180
line.AddPoint(lon, lat)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(line)
outFeature.SetField(lang_name, 'Arctic Circle')
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
# close the shapefile
outDataSet.Destroy()
# FRAME
# create the output layer
outputShapefile = folder+'frame_wgs84.shp'
if os.path.exists(outputShapefile):
driver.DeleteDataSource(outputShapefile)
outDataSet = driver.CreateDataSource(outputShapefile)
outLayer = outDataSet.CreateLayer('frame', srs, geom_type=ogr.wkbPolygon, options=['ENCODING=UTF8'])
# Add the field for longitude label
outLayer.CreateField(ogr.FieldDefn('id', ogr.OFTInteger))
# get the output layer's feature definition
outLayerDefn = outLayer.GetLayerDefn()
#create polygon
poly = ogr.Geometry(ogr.wkbPolygon)
ring = ogr.Geometry(ogr.wkbLinearRing)
lat = -90
lon = -180
ring.AddPoint(lon, lat)
while lon < 180 - density:
lon = lon + density
ring.AddPoint(lon, lat)
lon = 180
ring.AddPoint(lon, lat)
lon = 180
lat = -90
while lat < 90 - density:
lat = lat + density
ring.AddPoint(lon, lat)
lat = 90
ring.AddPoint(lon, lat)
lat = 90
lon = 180
while lon > -180 + density:
lon = lon - density
ring.AddPoint(lon, lat)
lon = -180
ring.AddPoint(lon, lat)
lon = -180
lat = 90
while lat > -90 + density:
lat = lat - density
ring.AddPoint(lon, lat)
lat = -90
ring.AddPoint(lon, lat)
poly.AddGeometry(ring)
# create a new feature
outFeature = ogr.Feature(outLayerDefn)
# set the geometry and attribute
outFeature.SetGeometry(poly)
outFeature.SetField('id', 1)
# add the feature to the shapefile
outLayer.CreateFeature(outFeature)
# destroy the features and get the next input feature
outFeature.Destroy()
# close the shapefile
outDataSet.Destroy()