def testLayerExtent(self):
""" postgis.layerRealExtent(ds, tabname, fname) returns "extent" JSON
"""
import postgis
ds = postgis.DataSource(self.conn)
tabname = 'patching'
fname = 'geog'
txt1 = u'ymax": 52.99648148'
txt2 = u'wkid": 4326'
res = postgis.layerRealExtent(ds, tabname, fname)
self.assertIn(txt1, res)
self.assertIn(txt2, res)
tabname = 'seisprof'
fname = 'geom'
txt1 = u'ymax": 81.59710856'
txt2 = u'wkid": 4326'
res = postgis.layerRealExtent(ds, tabname, fname)
self.assertIn(txt1, res)
self.assertIn(txt2, res)
tabname = 'flyzone'
fname = 'geom'
txt1 = u'"xmax": 158.29704000000001'
txt2 = u'wkid": 4326'
res = postgis.layerRealExtent(ds, tabname, fname)
self.assertIn(txt1, res)
self.assertIn(txt2, res)
def testLayerExtent(self):
""" postgis.layerRealExtent(ds, tabname, fname) returns "extent" JSON
"""
import postgis
ds = postgis.DataSource(self.conn)
tabname = 'patching'
fname = 'geog'
txt1 = u'ymax": 52.99648148'
txt2 = u'wkid": 4326'
res = postgis.layerRealExtent(ds, tabname, fname)
self.assertIn(txt1, res)
self.assertIn(txt2, res)
tabname = 'seisprof'
fname = 'geom'
txt1 = u'ymax": 81.59710856'
txt2 = u'wkid": 4326'
res = postgis.layerRealExtent(ds, tabname, fname)
self.assertIn(txt1, res)
self.assertIn(txt2, res)
tabname = 'flyzone'
fname = 'geom'
txt1 = u'"xmax": 158.29704000000001'
txt2 = u'wkid": 4326'
res = postgis.layerRealExtent(ds, tabname, fname)
self.assertIn(txt1, res)
self.assertIn(txt2, res)
def getExtent(ds, tabname, fname):
""" Bridge to PostGIS.
Extract layer extent in JSON format.
Args:
ds: postgis.DataSource with db connection.cursor;
tabname: db table name;
fname: geometry field name.
Returns:
JSON text with 'extent' structure according ArcGIS spec
http://resources.arcgis.com/en/help/rest/apiref/geometry.html#envelope
"""
#if 0: ds = postgis.DataSource('')
#assert isinstance(ds, postgis.DataSource)
if isinstance(ds, postgis.DataSource):
return postgis.layerRealExtent(ds, tabname, fname)
raise TypeError('Unknown datasource type')
def getExtent(ds, tabname, fname):
""" Bridge to PostGIS.
Extract layer extent in JSON format.
Args:
ds: postgis.DataSource with db connection.cursor;
tabname: db table name;
fname: geometry field name.
Returns:
JSON text with 'extent' structure according ArcGIS spec
http://resources.arcgis.com/en/help/rest/apiref/geometry.html#envelope
"""
#if 0: ds = postgis.DataSource('')
#assert isinstance(ds, postgis.DataSource)
if isinstance(ds, postgis.DataSource):
return postgis.layerRealExtent(ds, tabname, fname)
raise TypeError('Unknown datasource type')
