geojsonqgisshapefile
I have a shapefile where I am exporting the features to GeoJSON objects with ogr2ogr based on a simple where clause. One thing that I would like to be included in the GeoJSON object is the 'bbox' member (outlined here) , is it possible to add this as an attribute to the shapefile using QGIS?
I've done something similar with centroids and added the x/y as separate attributes. Are there any other ways to programmatically add this to my geojson files?
Thanks to gsherman above the PinPoint plugin example is perfect.
As I understand it the process is:
Here is an extract of my code which now works.
layer = QgsVectorLayer(
"Point?field=Rec_No:integer&field=Include:string(120)&field=Label:string(120)&field=X:double&field=Y:double&field=Z:double&field=Height:double&field=Project_Re:string(120)&field=NCA:string(120)&field=DayCrit:integer&field=EveCrit:integer&field=NightCrit:integer",
item,
"memory")
QgsMapLayerRegistry.instance().addMapLayer(layer)
# Receivers = as in the above example 'Receivers' is a list of results
for i in range(len(Receivers)):
# add a feature
feature = QgsFeature()
X = Receivers[i][3]
Y = Receivers[i][4]
feature.setGeometry( QgsGeometry.fromPoint(QgsPoint(X,Y)) )
# Details = as in the above example 'Details' is a list of results
if Receivers[i][1] != 0:
Include = 'Yes'
else:
Include = 'No'
values = [ QVariant(Receivers[i][0]), QVariant(Include), QVariant(Receivers[i][2]),
QVariant(Receivers[i][3]), QVariant(Receivers[i][4]), QVariant(Receivers[i][5]), QVariant(Receivers[i][6]),
QVariant(Details[0]), QVariant(Details[1]), QVariant(Details[2]), QVariant(Details[3]), QVariant(Details[4]) ]
feature.setAttributes(values)
layer.startEditing()
layer.addFeature(feature, True)
layer.commitChanges()
Excellent answers provided by @ChrisW and @CAccesible, both describe techniques which should do what you want. Just to add on what @ChrisW mentioned, a spatial join tool called Join by location would provide your points layer with another attribute column containing the names of the polygon it resides in, regardless of how many points there are in a polygon. I use this function many times with the following parameters to obtain results similar to what you want:
Best Answer
With ogr2ogr you can use -lco WRITE_BBOX=YES to output bounding box.