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Create geometry when harvesting documents with geographic extent

This commit is contained in:
Adrià Mercader 2011-03-18 13:40:49 +00:00
parent 51102c9330
commit b83443af4a
1 changed files with 54 additions and 2 deletions
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54
ckanext/harvest/controllers/harvesting.py
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@ -158,9 +158,9 @@ class HarvestingJobController(object):
'bbox-north-lat',
'bbox-south-lat',
'bbox-west-long',
'spatial-reference-system',
'guid',
# Usefuls
'spatial-reference-system',
'dataset-reference-date',
'resource-type',
'metadata-language', # Language
@ -217,6 +217,9 @@ class HarvestingJobController(object):
if package == None:
# Create new package from data.
package = self._create_package_from_data(package_data)
if package.extras.get('bbox-east-long'):
self._save_extent(package)
log.info("Created new package ID %s with GEMINI guid %s", package.id, gemini_guid)
harvested_doc = HarvestedDocument(
content=content,
@ -231,6 +234,9 @@ class HarvestingJobController(object):
return package
else:
package = self._create_package_from_data(package_data, package = package)
if package.extras.get('bbox-east-long'):
self._save_extent(package)
log.info("Updated existing package ID %s with existing GEMINI guid %s", package.id, gemini_guid)
harvested_doc.content = content
harvested_doc.source = self.job.source
@ -240,6 +246,52 @@ class HarvestingJobController(object):
assert gemini_guid == package.documents[0].guid
return package
def _save_extent(self,package):
#TODO: configure SRID
conn = model.Session.connection()
minx = float(package.extras.get('bbox-east-long'))
miny = float(package.extras.get('bbox-south-lat'))
maxx = float(package.extras.get('bbox-west-long'))
maxy = float(package.extras.get('bbox-north-lat'))
try:
# Check if extent already exists
rows = conn.execute('SELECT package_id FROM package_extent WHERE package_id = %s',package.id).fetchall()
update =(len(rows) > 0)
if update:
# Update
statement = """UPDATE package_extent SET
the_geom = ST_GeomFromText('POLYGON ((%(minx)s %(miny)s,
%(maxx)s %(miny)s,
%(maxx)s %(maxy)s,
%(minx)s %(maxy)s,
%(minx)s %(miny)s))',4258)
WHERE package_id = %(id)s
"""
msg = 'Updated extent for package %s'
else:
# Insert
statement = """INSERT INTO package_extent (package_id,the_geom) VALUES (
%(id)s,
ST_GeomFromText('POLYGON ((%(minx)s %(miny)s,
%(maxx)s %(miny)s,
%(maxx)s %(maxy)s,
%(minx)s %(maxy)s,
%(minx)s %(miny)s))',4258))"""
msg = 'Created new extent for package %s'
conn.execute(statement,{'id':package.id, 'minx':minx,'miny':miny,'maxx':maxx,'maxy':maxy})
model.Session.commit()
log.info(msg, package.id)
except:
log.error('An error occurred when saving the extent for package %s',package.id)
finally:
return package
def get_content(self, url):
try:
http_response = urllib2.urlopen(url)