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Another approach to extract line from polygon and merge line with polygon. Convert polygon to line. Goto: Vector -> Geometry tools -> Polygons to lines. Retain the lines u want and delete the rest of the line. To delete, load the new layer select Toggle Editing then Goto: Edit -> Split features Now draw line on top of line u want to delete new node will ...


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I think the repository you are looking for is https://github.com/olivierdalang/CadInput. Plugins-Manage and install plugins and you can give the repository there in order to install and use this plugin.


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When you create a PostGIS database using create extension postgis the "spatial_ref_sys" table is created automatically. I don't see any use case where you would want to do that by hand. If you are new to the technology, you really need to read some basic literature. Just asking about random details here won't get you anywhere. See for example Getting ...


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If GISGe's solution works, I'd go for it. Nevertheless, if you still need a solution to remove the holes from polygons, you can just run the union tool and unselect the "gaps allowed" checkbox.


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With ArcGIS for Desktop Advanced, you could Convert all depression lines vertices to points (with Feature Vertices to Points) Convert all vertices back to lines (with Points to Line, with the Close Line option checked) Revert the direction of all lines (with Flip Line).


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One option would be to use PHP if your Data is stored in a PostGIS-Database. You could register a click-event, post the click-coordinates to your php and use this coordinate to check for ST_Intersects to get back the feature attributes. would this be an option for you?


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The getFeatureInfo should work, asking for both layers you'll get all the features that intersects the requested pixel. If you receive features from both layers then that's your success condition. It's not perfect because is based on pixel area, not an exact position, but only with WMS that's all you got.



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