153GIS2 - 10. cvičení - GRASS GIS: Porovnání verzí
m (→2) |
m (→3) |
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Řádek 34: | Řádek 34: | ||
<source lang="python"> | <source lang="python"> | ||
import sys | |||
from grass.script import core, vector as grass | |||
input = sys.argv[1] # String - nazev obce | |||
output = sys.argv[2] # cesta k textovemu souboru | |||
select = grass.vector_db_select(map = "obce", | |||
where = "NAZEV = 'Liberec'") | |||
idx = select['columns'].index('OB01') | |||
ob01 = 0 | |||
for record in select['values'].itervalues(): | |||
ob01 += int(record[idx]) | |||
nazev_idx = select['columns'].index('NAZEV') | |||
f = open(output, 'w') | |||
try: | |||
for record in grass.vector_db_select(map = "obce", | |||
where = "OB01 > %d" % ob01)['values'].itervalues(): | |||
f.write("%s%s\n" % (record[nazev_idx].ljust(15), record[idx])) | |||
finally: | |||
f.close() | |||
</source> | </source> | ||
{{GIS}} | {{GIS}} | ||
{{GFOSS}} | {{GFOSS}} | ||
{{Python}} |
Verze z 26. 5. 2009, 17:56
Stránka obsahuje ukázky skriptů v Pythonu pro GRASS GIS z 10. cvičení GIS2.
1
from grass.script import vector as grass
for nazev in grass.vector_columns(map = 'obce').keys():
print nazev
2
from grass.script import core, vector as grass
select = grass.vector_db_select(map = "obce",
where = "NAZEV = 'Liberec'")
idx = select['columns'].index('OB01')
ob01 = 0
for record in select['values'].itervalues():
ob01 += int(record[idx])
nazev_idx = select['columns'].index('NAZEV')
for record in grass.vector_db_select(map = "obce",
where = "OB01 > %d" % ob01)['values'].itervalues():
print unicode(record[nazev_idx], 'latin2').ljust(15), record[idx]
3
import sys
from grass.script import core, vector as grass
input = sys.argv[1] # String - nazev obce
output = sys.argv[2] # cesta k textovemu souboru
select = grass.vector_db_select(map = "obce",
where = "NAZEV = 'Liberec'")
idx = select['columns'].index('OB01')
ob01 = 0
for record in select['values'].itervalues():
ob01 += int(record[idx])
nazev_idx = select['columns'].index('NAZEV')
f = open(output, 'w')
try:
for record in grass.vector_db_select(map = "obce",
where = "OB01 > %d" % ob01)['values'].itervalues():
f.write("%s%s\n" % (record[nazev_idx].ljust(15), record[idx]))
finally:
f.close()