攑ֱ�阿狗 — Wed, 01 Feb 2012 18:14:00 GMT

公司的shp数据都是以秒为单位存储，要做监控和道路匹配，直接与gps接收坐标无法实现�Q�必��{换shp单位为度单位

  1 #--coding:utf-8---
  2 #  brief:  内业shp数据�Q��{换秒到度为单�?/span>
  3 # author: scott
  4 # date: 2012.1.30
  5 # org:  --navi.com
  6 #
  7 # version: v0.1.0 2012.2.1
  8 #  1.create doc and test ok, types (included point|line|polygon|multipolygon) be supported
  9 #
10
11 import os,os.path,sys,time,copy,shutil
12 from osgeo import ogr
13
14
15 def do_layerPoint(layer):
16     ftr = layer.ResetReading()
17     ftr = layer.GetNextFeature()
18     print 'point num:',layer.GetFeatureCount()
19     print 'extent:',layer.GetExtent()
20     cc = 1
21     while ftr:
22         #print cc
23         cc+=1
24         pt = ftr.GetGeometryRef().GetPoint(0)
25         g = ftr.GetGeometryRef()
26         #print g#,g.ExportKML()
27         if pt[0] >1000 or pt[1] > 1000:
28             g.SetPoint(0,pt[0]/3600.,pt[1]/3600.)
29             #print g
30
31             '''
32             ng = ogr.Geometry(ogr.wkbPoint)
33             print pt
34             ng.SetPoint(0,pt[0]+40,pt[1])
35             ftr.SetGeometry(ng)
36             '''
37             layer.SetFeature(ftr)
38         ftr = layer.GetNextFeature()
39
40 def do_layerLine(layer):
41     ftr = layer.ResetReading()
42     ftr = layer.GetNextFeature()
43
44     while ftr:
45         g = ftr.GetGeometryRef()
46         cnt = g.GetPointCount()
47         cc = 0
48         while cc < cnt:
49             #print g.GetPoint(cc)
50             cc+=1
51
52         for n in range(cnt):
53             pt = g.GetPoint(n)
54             if pt[0]>1000 or pt[1] > 1000:
55                 g.SetPoint(n,pt[0]/3600.,pt[1]/3600.0)
56         layer.SetFeature(ftr)
57
58         ftr = layer.GetNextFeature()
59
60 def do_layerPolygon(layer):
61     ftr = layer.ResetReading()
62     ftr = layer.GetNextFeature()
63
64     while ftr:
65         g = ftr.GetGeometryRef()
66         cnt = g.GetGeometryCount()
67         for n in range(cnt):
68             gg = g.GetGeometryRef(n)
69             for m in range(gg.GetPointCount() ):
70                 pt = gg.GetPoint(m)
71                 #print pt
72                 if pt[0]>1000 or pt[1] > 1000:
73                     gg.SetPoint(m,pt[0]/3600.,pt[1]/3600.0)
74         layer.SetFeature(ftr)
75         ftr = layer.GetNextFeature()
76
77 def do_shpfile(file):
78     #print file
79     print 'ready file:',file
80     driver = ogr.GetDriverByName('ESRI Shapefile')
81     #shp = driver.Open('e:/shp_data/points.shp',1)  # 0 - read , 1 - write
82     shp = driver.Open(file,1)  # 0 - read , 1 - write
83
84     layer = shp.GetLayer()
85
86     if layer.GetFeatureCount() == 0:
87         return
88
89     gtyp = layer.GetLayerDefn().GetGeomType()
90
91     if file.lower().find('province') == -1:
92         pass #return
93
94     if gtyp == ogr.wkbPoint:
95         do_layerPoint(layer)
96     elif gtyp == ogr.wkbLineString:
97         do_layerLine(layer)
98     elif gtyp == ogr.wkbPolygon:
99         do_layerPolygon(layer)
100     else:
101         print 'unknown type:',gtyp,'  ',file
102
103     layer.SyncToDisk()
104     shp.Destroy()
105
106
107 def convert(shpdir):
108     files = os.listdir(shpdir)
109     for file in files:
110         if  file.lower().find('.shp') ==-1:
111             continue
112
113         #if file == 'points.shp':
114         do_shpfile(shpdir+"/"+file)
115
116 if __name__=='__main__':
117     #convert( 'e:/shp_data' )
118     if sys.argv[1:]:
119         convert(sys.argv[1])
120     else:
121         convert( 'D:/temp3/mess/MESH/H51F009012')
122

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