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This commit is contained in:
artemp 2012-12-03 18:15:34 +00:00
parent 46d6026356
commit 40175253d6
1 changed files with 13 additions and 9 deletions
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22
utils/shapefile/shapefile_reader.py
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@ -26,8 +26,8 @@ if __name__ == "__main__" :
_,_,_,_,_,_,shp_file_length = header[0].unpack_from(shp.read(28))
_,_,lox,loy,hix,hiy,_,_,_,_ = header[1].unpack_from(shp.read(72))
print "SHX FILE_LENGTH=",shx_file_length
print "SHP FILE_LENGTH=",shp_file_length
print "SHX FILE_LENGTH=",shx_file_length,"bytes"
print "SHP FILE_LENGTH=",shp_file_length,"bytes"
print "BBOX(",lox,loy,hix,hiy,")"
record_header = struct.Struct(">II")
@ -35,17 +35,21 @@ if __name__ == "__main__" :
calc_total_size = 50
count = 0
while shx.tell() < shx_file_length * 2 :
offset,len = record.unpack_from(shx.read(8))
offset,shx_content_length = record.unpack_from(shx.read(8))
shp.seek(offset*2, os.SEEK_SET)
record_number,content_length = record_header.unpack_from(shp.read(8))
print (2*offset),record_number,content_length
#print (2*offset),record_number,content_length
if shx_content_length <> content_length:
print "BAD SHAPE FILE: content_lenght mismatch in SHP and SHX",shx_content_length,content_length
sys.exit(1)
calc_total_size +=(4 + content_length)
count+=1
print "SHAPES COUNT=",count
if shp_file_length-calc_total_size <> 0 :
print "BAD SHAPE FILE"
print "extra ", 2*(shp_file_length-calc_total_size)," bytes"
delta = shp_file_length-calc_total_size
if delta > 0 :
print "BAD SHAPE FILE: extra ", 2*(shp_file_length-calc_total_size),"bytes"
elif delta < 0:
print "BAD SHAPE FILE: missing ", 2*(shp_file_length-calc_total_size),"bytes"
else:
print "GOOD!"
print "SHAPE FILE IS GOOD!"