Tag Info

New answers tagged


Look at this topic: Remove islands and completely surrounded polygons after polygonization with QGIS There is answer how to select surrounded polygons.After that you can make a new layer from selection. (For QGIS)


I am not aware of any settings that would allow you to select only the top polygons because when you click on the small polygon, you also click on the underlying polygon. Workarounds: Copy top polygons (if there is a way to differentiate them either by attribute or by size) into a new layer and then make your "large polygons" layers non-selectable. Work ...


Also, my original question had also asked how to do this in QGIS, but somebody came and removed that for some reason ... for people who are interested in doing this using QGIS, I found how to do this from this Stack Overflow post: Selecting features within polygon from another layer using QGIS? You can use the "Vector->Research tools->Select by Location" ...


Two ways: use select by location or intersect. Good tutorials on ESRI's site in the hyperlinks, so I won't give instructions here.


It's possible but not trivial. A way to do it is to subclass L.TileLayer in such a way that each tile is wrapped in a <canvas> (like https://github.com/aparshin/leaflet-boundary-canvas/blob/master/src/BoundaryCanvas.js#L244 does), then attaching events to the canvases to fetch the pixel value of a given pixel. You might also run into CORS issues when ...


If you have interest of this task, i realized this follow method: $("#erase").click(function() { clearCustomInteractions(); $(this).addClass('active'); map.addInteraction(erase); erase.getFeatures().on('change:length', function(e){ if(e.target.getArray().length !== 0) { var i = e.target.item(0); var k = ...


I figured it out for anyone who has a similar question: I needed to use a UTM coordinate system instead of the one I originally chose. The Raster file needed to be UTM 17 while the Shape file needed be UTM 16. If they were both the same it still wouldn't overlay.


Not sure if this will help... First Create a folder. For example, name the folder "TOGETHER". Uncheck the "Allow this folder to be expanded" box. Move the desired feature "Overlay" into this "TOGETHER" folder, along with all of the other features. Now all of the features will be turned on or off together with a single click.


How about using an 'Intersect' tool. Just create a new polygon shapefile, copy all features from your 3 shapefiles. and run Intersect just to get an extra layer with all overlaps If you have more time to play with data, you can intersect only two layers a time just to identify and symbolise intersections of each shapefile (1 and 2, 1 and 3, 2 and 3)

Top 50 recent answers are included