Created
September 29, 2011 22:10
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Simple PHP class to get shapefile rows using ogr
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<?php | |
/** | |
* Could also look at parsing shapefiles manually: http://en.wikipedia.org/wiki/Shapefile#Shapefile_shape_format_.28.shp.29 | |
*/ | |
class wktFromZip { | |
function __construct($fid) { | |
// Extract zip file to tmp. | |
$file = file_load($fid); | |
$extracted_path = drupal_realpath('public://tmp/' . basename($file->filename, '.zip')); | |
$zip = new ArchiverZip(drupal_realpath($file->uri)); | |
$zip_contents = $zip->listContents(); | |
$zip->extract($extracted_path); | |
// Look for shapefiles. | |
$shapefiles = file_scan_directory($extracted_path, '/^.*\.(shp)$/'); | |
foreach ($shapefiles as $shapefile) { | |
$ogr2ogr = '/Library/Frameworks/GDAL.framework/Versions/1.8/Programs/ogr2ogr'; // vget(). | |
$command = $ogr2ogr . ' -f CSV /vsistdout/ ' . $shapefile->uri . ' -lco GEOMETRY=AS_WKT'; | |
// Can also seek to arbitrary features quite easily, for example: ogr2ogr -f CSV /vsistdout/ vector.shp -lco GEOMETRY=AS_WKT -where 'fid in (1,2,3,4,5)' | |
// Grab CSV representation of the SHP and do something with it. Maybe better to do GeoJSON? | |
if (($handle = popen($command, "r")) !== FALSE) { | |
$header = array(); | |
while (($data = fgetcsv($handle)) !== FALSE) { | |
// Hold onto the header so we can do field mapping. | |
if (empty($header)) { | |
$header = $data; | |
} | |
else { | |
$record = array_combine($header, $data); | |
//print $record['Label']; | |
// Do stuff, like push data into a node with a Geofield. | |
} | |
} | |
pclose($handle); | |
} | |
else { | |
throw new Exception('ogr2ogr could not execute'); | |
} | |
} | |
file_unmanaged_delete_recursive($extracted_path); | |
} | |
} |
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