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In a python script I want to specify a request filter expression using a spatial operator. I am following the general syntax "field name" operator condition. For example: setFilterExpression('$geometry soOverlaps QgsRectangle(...)')This gives no results and no error. Please can somebody...

I'm trying to load gml into openlayers3 there is the code: Vector layer example html, body, #map { margin: 0; width: 100%; height: 100%; } var vectorLayer = new...

I am creating a python tool which looks like the figure below. Input feature: It asks for a input feature class. Valuetable(Lookup tables): It has two columns - one for look up tables and another for fields. The fields in value table should have dependency on Input feature. is this...

I have own tiles (.png) of 512x512 pixels and I would like to display them in OpenLayers 3 without projection (for now). Therefore I found a way to use the ZOOMIFY projection but with a "ol.layer.Tile"-Layer.(original source: https://groups.google.com/forum/#!topic/ol3-dev/VVdNXHwiZEk) So far...

I am trying to make pizza type shape with various radious of each slice. Number of slices depend on number of years and radius of each slice depends on number of population. All I know the center longitude-latitude, and radius (num of population). Can anyone let me how to make such shape and how...

Earlier this week when creating the map of Chinese map offsets it reminded us of a project we have long wanted to work on – mapping the density of historical imagery in Google Earth. When you are in historical imagery and you look at the timeline, you can tell roughly how many historical images...

The standard behaviour when rendering WMS layers is to keep the text size across all scales and then filter out colliding labels so that the text remains readable, although delivering incomplete information. Now, I'd like to invite the user to zoom in when he wants to actually read the labels...

As part of developing scripts and to save the other services/resources accessed by ArcGIS, is there a way or separate installer to install Python and ArcPy libraries alone without installing ArcMap? أكثر...

I'm very new to GIS mapping and I have some polygons loaded into ArcGIS Pro. I need to associate some data that is currently stored in Excel with each polygon e.g. population density, average rent. I have tried saving the excel as CSV, adding it as a layer and then I attempted creating a join...

As Geo-geeks we’re also tech-geeks. We prefer GPS-equipped gadgets but we like all smartwatches even if they don’t have positioning sensors. We took top 10 smartwatches and running/fitness and watches removed their branding. Can you match a watch with its brand? It’s a real geekiness test! As...

QGIS does not display all Features of Layer and behaves weird instead I got the comment: "How did you create the other features in PostGIS (as opposed to the ones that were edited)? My initial thought is the ones that are not coming in correctly may not have an SRID set or are similarly...

I created a heatmap on QGIS (2.8) and styled it using singleband pseudocolor. I want to turn it into map tiles, so I added the TIFF as a layer in TileMill. However, when it's in TileMill, it loses the style settings from QGIS and becomes black and white. I'm not entirely sure if this is an...

I have a TIN model where I remove some of the triangles (see fig. 1). Most of the triangles touch on one edge, some on one vertice. I would now like to generate a polygon shapefile containing the remaining triangles, dissolved into one polygon (of multiple rings, see fig. 2). Fig 1. - TIN...

I am a novice to the field of GIS so please forgive my ignorance. I am required to plot a shapefile (.shp) on a basemap which is an openlayers map. The shapefile is published in GeoServer as a wms layer. How do I extract the legends information from the shapefile so that I can display it on...

I'm hoping someone out there might be able to help or suggest some tests to try and resolve some very odd QGIS behaviour of late... Our core GIS team of 4 users has been testing v2.10 prior to roll-out for the remainder of the organization. In the past couple of weeks we have had some very odd...

See this interesting wibinar about Location Analytics in Health & Social Care. أكثر...

/ Background: I have a DWG trace made in AutoCad using Gauss-Kruger coordinate system ( a CRS used in Slovenia ). I'm using AutoDesk Map 3D to transform the coordinate system to WGS84.PseudoMercator EPSG:3857 which is required by Google to show traces on maps. / I saved the drawing as DXF...

I define a field of a vector layer as ValueMap. I define the values manually, then the feature attribute dialog appears with the combobox. But the first row in my combobox is empty. I use QGis2.8. In QGis2.0 the first row was not empty. Why is the first row of my ComboBox empty? If I...

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I'm looking for a Arcmap add-in, which would speed up the attribute editing process. The add-in should allow selecting few attribute columns for editing and then provide the possible option for the cell in a taskbar. Also it would be great if there would be possibility to move to next row and...