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I have an Openlayers 3 app and users can retrieve stored routes from a web service and display them on a map. Currently each route is added to the top of the index but I'd like them to be inserted into an existing Layer Group. I've tried using these to methods so far but to no avail: var...

I have created a tile server with help from this guide.Sadly I still have no software to actually create the tiles and because of that I load in a online map (HOT) from OSM via Openlayers: var map = new ol.Map({ target: 'map', controls: [], layers: [ new ol.layer.Tile({...

I am working with leaflet api, where user draw shapes on images.There are multiple layers controlled by currentFeatureGroup(), when i draw triangle or circle, the clearlayer control works fine, but when i draw from my custom control which uses polyline decorator and marker as symbol then after...

I have one table with a few columns (and around 9000 rows) see below. Now I would like to calculate the positive difference from R where Xn has the same value and when Xn has the same value as Yn. So the search should take place within the column xn first where there is a value the same like...

First I should clarify I don't have previous experience with the field, so I don't know the technical terminology. My question is as follows: I have two weather datasets: The first one has the regular coordinate system (I don't know if it has an specific name), ranging from -90 to 90 and...

Hi, I.ve got a map in qgis that I have been able to get most of the data for ( a small island in the carribean) I have streets, some landmarks etc but alas no buildings. what is the best way to go about getting the buildings into my map? I have procured som nice drone videos flying over the...

I have a line shapefile with a local transverse mercator projection("+proj=tmerc +lat_0=50 +lon_0=172.5 +x_0=0 +y_0=0 +a=6371000 +b=6371000 +units=m +no_defs") and I want to reproject it into EPSG:4326 with ogr2ogr.The line feature is crossing the international date meridian, as you can see in...

I'm trying to modify a linestring after the user clicked on the map in order to calculate best route from last point to clicked point using a routing algorithm (getRoute). The following code is not working as expected... Have you ever try to do this? me.drawFollowingPathMode = false;var olDraw...

How is it possible to open a window by clicking on a point of a point shapefile? This window should display particular attributes of the attribute table and, if somehow possible, geotagged photos. Is it possible and useful with photo2shape or eVIS? thx أكثر...

I have a polyline shapefile that I am displaying in my android app. (Eclipse ADT java etc) The Shapefile is of a road network and includes attributes such as the RoadID etc. the polylines of the roads are displaying nicely How do I display the Road Id (or any other text attributes in the...

Seeking a tool for routing, in which I can customize the routing algorithm. The whole thing is then to be deposited with a map and visualized. Basically, a Google Maps in which I can even deposit the Deodaten and anpsaaen the routing algorithm. Routing im Netzwerk Ich suche ein Tool zum...

I am working on application uses the leaflet api Live Here User must enter "1" in alert input field to use the application. Introduction Application has some controls to draw different shapes on image.I am going to discuss one control, which suppose to draw line. The line actually (polyline)...

I have an SQL Server 2012 table, which contains a DbGeometry column with a spatial index. Then a Geoserver 2.7 using it. The problem is that when I do a WFS query it doesn't restrict the results to the coordinates I pass in by BBOX, it always returns all records. I create the database entry...

Is it possible to enable Cross-Origin Resource Sharing (CORS) in OpenLayers? If so, how? I have a web map in OpenLayers, and I'm using an HTML canvas to render it as a PNG image. My script works great, but due to the browser's same-origin policy, I can only convert my canvas to an image if...

I am learning to write Python code for ArcGIS 10.2. I have some shp poly lines file, need to learn how to write multiple selection of those lines, even if a cursor of mouse pressed not exactly on line but near of it. By selecting one vertex, on the cross place of lines should be selected all...

I am trying to take an existing shapefile and narrow down the attributes using the 'select by attribute' The problem I am trying to solve is: Find parcels that have an acreage >= 100. The code I have is not narrowing down the search or showing up in arcmap. Below is the code I have so far...

In my vector field I would like to summarize all values in a column, how yo do so? If I right-click in the attribute table it is possible to choose summarize, but if I do so and select the column I want to include the values in the column is not summarized I only get a Sum_output. In the...

Bonjour, J'utilise actuellement l'outil TauDEM sur QGIS pour extraire des réseaux hydrographique sur la base de DEM. J'ai un shapefile des sources (inlets) et je souhaiterai reconstruire mon réseau hydrographique seulement depuis ces points en utilisant un fichier de direction de flux. J'ai...

I would like to remove all of the superfluous lines in a geology layer I have - see pic below. I want all Orange parts to be connected as one rather than being intersected by all of the lines you can see. أكثر...

I am trying to find a a resource that provides English/French translations for GIS terminology. Obviously I could use Google or a French/English dictionary, but there are many cases where there are multiple French words. For example, the word layer could be translated as couche (which seems to...