# -*- coding: utf-8 -*-
print(u"python与开源QGis课题研究组")
#print("汉字")
#+++++++++++++++++
#创建矢量数据文件
#+++++++++++++++++
try:
from osgeo import ogr
except:
import ogr
driver = ogr.GetDriverByName("ESRI Shapefile")
import os
'''
ds = driver.CreateDataSource("xx_tesp.shp")
layer = ds.CreateLayer('test',geom_type = ogr.wkbPoint)
fieldDefn = ogr.FieldDefn('id',ogr.OFTString)
fieldDefn.SetWidth(4)
layer.CreateField(fieldDefn)
featureDefn = layer.GetLayerDefn()
print(featureDefn)
feature = ogr.Feature(featureDefn)
#设定几何形状
point = ogr.Geometry(ogr.wkbPoint)
point.SetPoint(0,123,123)
#设定字段数值
feature.SetField('id',23)
#将要素写入到图层
layer.CreateFeature(feature)
ds.Destroy()
import os
out_shp = "xx_tesp.shp"
dir(out_shp)
if os.path.exists(out_shp):
driver.DeleteDataSource(out_shp)
dir(out_shp)
point = ogr.Geometry(ogr.wkbPoint)
print(point)
point.AddPoint(10,20)
print(point)
point.AddPoint(30,20)
print(point)
line = ogr.Geometry(ogr.wkbLineString)
print(line)
line.AddPoint(10,10)
print(line)
line.AddPoint(20,20)
print(line)
line.SetPoint(2,30,30)
print(line)
print(line.GetPointCount())
print(line.GetX(0))
print(line.GetX(1))
print(line.GetX(3))
ring = ogr.Geometry(ogr.wkbLinearRing)
ring.AddPoint(0,0)
ring.AddPoint(100,0)
ring.AddPoint(100,100)
ring.AddPoint(0,100)
ring.CloseRings()
print(ring)
print(type(ring))
outring = ogr.Geometry(ogr.wkbLinearRing)
outring.AddPoint(0,0)
outring.AddPoint(100,0)
outring.AddPoint(100,100)
outring.AddPoint(0,100)
outring.AddPoint(0,0)
inring = ogr.Geometry(ogr.wkbLinearRing)
inring.AddPoint(25,25)
inring.AddPoint(75,25)
inring.AddPoint(75,75)
inring.AddPoint(25,75)
inring.CloseRings()
polygon = ogr.Geometry(ogr.wkbPolygon)
polygon.AddGeometry(outring)
polygon.AddGeometry(inring)
print(polygon.GetGeometryCount())
#outring2 = polygon.GetGeometryRef(0)
#inring2 = polygon.GetGeometryRef(1)
#print(outring2)
#print(inring2)
for ringx in range(polygon.GetGeometryCount()):
print(polygon.GetGeometryRef(ringx))
multipoint = ogr.Geometry(ogr.wkbMultiPoint)
point = ogr.Geometry(ogr.wkbPoint)
point.AddPoint(10,10)
multipoint.AddGeometry(point)
print(multipoint)
point.AddPoint(20,20)
multipoint.AddGeometry(point)
print(multipoint)
mp = multipoint.GetGeometryCount()
print(mp)
for mpx in range(multipoint.GetGeometryCount()):
print(multipoint.GetGeometryRef(mpx))
extfile = 'xx_data_pt.shp'
if os.access(extfile,os.F_OK):
driver.DeleteDataSource(extfile)
#1、创建数据源
newds = driver.CreateDataSource(extfile)
#print(dir(newds))
#print(dir(newds.CreateLayer))
#2、创建数据源图层
lyrn = newds.CreateLayer('point',None,ogr.wkbPoint)
#3、定义图层字段，添加图层字段
fieldcnstr = ogr.FieldDefn("idx",ogr.OFTInteger)
lyrn.CreateField(fieldcnstr)
fieldf = ogr.FieldDefn("namex",ogr.OFTString)
lyrn.CreateField(fieldf)
point_coors_arr = [[1,0],[2,0],[3,0],[4,0]]
for idxx,point_coors in enumerate(point_coors_arr):
#print(type(idxx))
#print(type(point_coors))
wkt = 'POINT (%f %f)' % (point_coors[0],point_coors[1])
#print(wkt)
geom = ogr.CreateGeometryFromWkt(wkt)
feat = ogr.Feature(lyrn.GetLayerDefn())
feat.SetField('idx',idxx)
feat.SetField('namex','ID{0}'.format(idxx))
feat.SetGeometry(geom)
lyrn.CreateFeature(feat)
#print(lyrn.GetLayerDefn())
#print('idx:%i' % (idxx))
#print("namex:%s" % 'ID{0}'.format(idxx))
#x = 'ID{0}'.format(idxx)
#print(x)
"""
wkt = 'POINT (%f %f)' % (point_coors[0],point_coors[1])
geom = ogr.CreateGeometryFromWkt(wkt)
feat = ogr.Feature(lyrn.GetLayerDefn())
feat.SetField('idx',idxx)
feat.SetField('namex','ID{0}'.format(idxx))
feat.SetGeometry(geom)
lyrn.CreateFeature(feat)
"""
newds.Destroy()
extfile = 'xx_data_line.shp'
driver = ogr.GetDriverByName("ESRI Shapefile")
if os.access(extfile,os.F_OK):
driver.DeleteDataSource(extfile)
newds = driver.CreateDataSource(extfile)
lyrn = newds.CreateLayer('line',None,ogr.wkbLineString)
#字段定义创建
fieldcnstr = ogr.FieldDefn("id",ogr.OFTInteger)
fieldf = ogr.FieldDefn("name",ogr.OFTString)
lyrn.CreateField(fieldcnstr)
lyrn.CreateField(fieldf)
point_coors_arr = [[0,0,1,2,3,-2,6,0]]
#print(point_coors_arr)
#print(type(point_coors_arr))
#print(len(point_coors_arr))
for idx,point_coors in enumerate(point_coors_arr):
#wkt = 'LINESTRING(%f %f,%f %f,%f %f,%f %f)' % (point_coors[len(point_coors_arr) - len(point_coors_arr)],point_coors[len(point_coors_arr) - len(point_coors_arr) + 1],)
wkt = 'LINESTRING(%f %f,%f %f,%f %f,%f %f)' % (point_coors[0],point_coors[1],point_coors[2],point_coors[3],point_coors[4],point_coors[5]
,point_coors[6],point_coors[7])
print(wkt)
geom = ogr.CreateGeometryFromWkt(wkt)
feat = ogr.Feature(lyrn.GetLayerDefn())
feat.SetField('id',idx)
feat.SetField('name','line_one')
feat.SetGeometry(geom)
lyrn.CreateFeature(feat)
newds.Destroy()
extfile = 'xx_data_polygon.shp'
driver = ogr.GetDriverByName('ESRI Shapefile')
if os.access(extfile,os.F_OK):
driver.DeleteDataSource(extfile)
#创建数据源文件
newds = driver.CreateDataSource(extfile)
#创建几何形状图层
lyrn = newds.CreateLayer('polygon',None,ogr.wkbPolygon)
#定义字段
fieldcnstr = ogr.FieldDefn('id',ogr.OFTInteger)
fieldf = ogr.FieldDefn('name',ogr.OFTString)
#图层添加字段
lyrn.CreateField(fieldcnstr)
lyrn.CreateField(fieldf)
wkt_polygon_1 = 'POLYGON((2 1,12 1,12 4,2 4,1 2))'
wkt_polygon_2 = 'POLYGON((4 1,8 1,8 3,4 3,3 1))'
wkt_polygon_3 = 'POLYGON((8 4,10 4, 10 5,8 5,6 4))'
#print(type(wkt_polygon_1))
point_coors_arr = [wkt_polygon_1,wkt_polygon_2,wkt_polygon_3]
#print(type(point_coors_arr))
for idx,point_coors in enumerate(point_coors_arr):
#print(idx)
#print(point_coors)
wkt = point_coors
#使用wkt创建几何图形
geom = ogr.CreateGeometryFromWkt(wkt)
#获取图层要素 ogr.GetLayerDefn , ogr.Feature()
feat = ogr.Feature(lyrn.GetLayerDefn())
feat.SetField('id',idx)
print('poly_{idx}'.format(idx = idx))
#feat.SetField('name','poly_{idx}'.format(idx = idx))
feat.SetField('name','poly_{idx}'.format(idx = idx))
feat.SetGeometry(geom)
lyrn.CreateFeature(feat)
newds.Destroy()
from osgeo import ogr
import os,math
inshp = "xx_data_polygon.shp"
ds = ogr.Open(inshp) #打开shp源文件
driver = ogr.GetDriverByName("ESRI Shapefile")
outputfile = "xx_data_polygon_copy.shp" #输出shp
if os.access(outputfile,os.F_OK):
driver.DeleteDataSource(outputfile)
pt_cp = driver.CopyDataSource(ds,outputfile)
pt_cp.Release()
from osgeo import ogr
import os,math
inshp = 'xx_data_polygon.shp'
ds = ogr.Open(inshp)
driver = ogr.GetDriverByName("ESRI Shapefile")
outputfile = 'cp_polygon.shp'
if os.access(outputfile,os.F_OK):
driver.DeleteDataSource(outputfile)
pt_cp = driver.CopyDataSource(ds,outputfile)
pt_cp.Release()
outputfile = 'cp2.shp'
if os.access(outputfile,os.F_OK):
driver.DeleteDataSource(outputfile)
newds = driver.CreateDataSource(outputfile)
layer = ds.GetLayer()
pt_layer = newds.CopyLayer(layer,'xxx')
#newds.Destroy()
outputfile = 'cp3.shp'
if os.access(outputfile,os.F_OK):
driver.DeleteDataSource(outputfile)
newds = driver.CreateDataSource(outputfile)
layernew = newds.CreateLayer('worldcopy',None,ogr.wkbLineString)
layer = ds.GetLayer()
feature = layer.GetNextFeature()
if feature is not None:
layernew.CreateFeature(feature)
feature = layer.GetNextFeature()
newds.Destroy()
driver = ogr.GetDriverByName("ESRI Shapefile")
inshp = 'xx_data_polygon.shp'
ds = ogr.Open(inshp)
outf = 'cxp.shp'
if os.access(outf,os.F_OK):
driver.DeleteDataSource(outf)
print("exists")
newds = driver.CreateDataSource(outf)
layernew = newds.CreateLayer('worldcopy',None,ogr.wkbLineString)
layer = ds.GetLayer()
#print(layer)
feature = layer.GetNextFeature()
print(feature)
while feature is not None:
layernew.CreateFeature(feature)
feature = layer.GetNextFeature()
newds.Destroy()
'''
from osgeo import ogr
ds = ogr.Open('convChk.shp')
layer = ds.GetLayer(0)
spatialRef = layer.GetSpatialRef()
print(spatialRef)