def newRegion():
"""
Creates new region with given code and geometry in region table
"""
code = request.args.get('code')
if Region.filter_by(code = code).count() > 0:
return flask.jsonify({
'result': 'failed',
'error': 'already_exists',
'errorMsg': 'Region with same code already exists' }), 500
wkt = request.args.get('wkt')
gjson = request.args.get('geo_json')
if wkt is None and gjson is not None:
conn = DBSession.connection()
result = conn.execute("SELECT ST_AsText(ST_Multi(ST_GeomFromGeoJSON('%s'))) as g" % gjson)
for row in result:
wkt = row['g']
name = request.args.get('name')
if name is None:
name = code
simpl_buf = request.args.get('simpl_buf')
simpl_dp = request.args.get('simpl_dp')
if code != None and wkt != None :
expression = "ST_SetSRID(ST_Multi(ST_GeomFromText('%s')), 4326)" % wkt
Region(name = name, code = code,
expression = expression,
simpl_buf = simpl_buf,
simpl_dp = simpl_dp).add()
DBSession.commit()
region = Region.filter_by(code=code).one()
return flask.jsonify({
'id': region.id,
'result': 'created' })
else:
return flask.jsonify({
'result': 'failed',
'error': 'not_enough_arguments',
'errorMsg': 'You need to specify code and wkt or geo_json at least' }), 500
def region(code):
region = Region.filter_by(code=code).one()
qgeom = DBSession.execute(
"""SELECT
ST_AsGeoJSON(ST_Difference(geom_out, geom_in )) AS ring,
ST_AsGeoJSON(geom) AS geom,
ST_AsGeoJSON(eval(expression)) AS current,
ST_XMin(geom_out) AS min_x,
ST_XMax(geom_out) AS max_x,
ST_YMin(geom_out) AS min_y,
ST_YMax(geom_out) AS max_y
FROM region WHERE id = :id""",
dict(id=region.id)
).fetchone()
return render_template(
'region.html',
region=region,
qgeom=qgeom,
version=DumpVersion.query().one(),
export_url=app.env.config['web'].get('export_url', None),
)
def shutdown_session(exception=None):
DBSession.remove()