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SQL Server 2008 and up allow you to create a spatial index. If you select records that include a geography or geometry object, a spatial data tab appears that can display up to 5000 points or lines or other shapes. You can select a label column, pan, and zoom. I am trying to debug a road network...

I need to subset mosaics of remotely sourced data to the extents of several prominent North American mountain ranges, starting with the Sierra Nevada. After searching for the boundaries of the range it has become clear to me that this isn't quite as straightforward as I thought: wikipedia...

I am trying to split polylines by points which have a small buffer around them. Currently I have over 370,000 lines and 320,000 nodes and the query is running really slowly (I've left it for 3 days and it still hasn't completed). I have tried forcing a spatial index using with (Index(SI_tempPD))...

Can we display degrees, minutes, seconds in QGIS Print Composer window instead of decimal degrees? Is there any plugins available for that? أكثر...

I have a checkbox that corresponds to certain layers (roads, city limits, etc.) and set up a cache hierarchy so that when the user zooms in and out, the symbology will change and labels will appear and so on and so forth. How can I assign the check box more than one value? I want it to stay...

I have what I hope to be a pretty simple question. As you can see in my fancy lil' diagram, we have ArcGIS set up with 2 other computers for load balancing. We also have SQL Express 2008 but it's under a different domain. My manager's goal was to a) register data on the AGS which is stored in...

How would I export feature edit layers or their table data from arcgis online using Python or Arcpy? I want to download the attributes of a feature edit layer. أكثر...

There are many functions of AutoCAD Map 3D that make it a companion to, rather than a competitor of, the applications produced by the GIS giant, ESRI. Being able to accurately geo-reference images as a background and then importing a diverse collection of GIS data, all while working in an...

So I have a JSON file displayed on my leaflet webmap. I would like to have it so a popup will appear when a feature is clicked. Right now it is a polygon feature. How do I call up information from the JSON file (Syriashape.json) so it can be displayed? The fields I would like to display are...

This seems fairly straightforward but I'm having trouble finding the right data. All I need is the name, address, and lat long of all universities and colleges in North America. I've come across a list of many universities in America here...

I am trying to map out Montreal and was wondering if there is already an existing polygon shapefile of all the neighborhoods. Here is a link to a perfect example of what I am looking for. http://en.wikipedia.org/w/index.php?title=File:ArrondissementsQuartiersMontreal.svg&page=1 If I can...

I'm using the TauDEM on Qgis to extract drainage area network from DEM. I could do it easily using the threshold method of TauDEM. Now I would like to do it using a shapefile of the inlets of the network. So I'd like to consider only the cells downslope (by the D8 flow model) of the inlets. I...

I've got a series of xyz files, representing each a series of xyz bathymetric points on the same navigation line. How I can convert them all to profiles, one for each line?There are so much files to do it with manual tools, like ArcGIS Point Profile, so I look for a batch solution. I've tried to...

Most Opensource tools are cross platform; however, some GIS tools such as ArcGIS are platform specific (windows only). What are some of the GIS tools that are usable on the mac? EDIT Although thank you for putting the basic apps in your answers, my question specifies that Most if not all of...

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...

Bonjour, Voici une solution pour calculer en un clic ou deux clics la surface des entités d'une couches, via les actions de QGIS et après la préparation suivante. cliquer droit sur la couche / Propriétés puis se rendre sur l'onglet actions, pour créer l'action suivante : type de l'action ...

In Publishing interactive web maps using QGIS, I presented two plugins for exporting web maps from QGIS. Today, I want to add an new member to this family: the qgis2web plugin is the successor of qgis-ol3 and combines exports to both OpenLayers3 as well as Leaflet. The plugin is under active...

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I need to solve two problems: convert my coordinates from wgs84 to epsg28992 use external geojson from an jsonp url Both problems are as far as I understand not supported by Leaflet itself. So I took a deep dive to found alternative methods. The content of the jsonp looks like...

I'm designing a symbol for an external application that needs to be a vector field marker combined with a simple point marker, displaying a line at a certain angle around the center point. In PyQGIS, it's easy to instantiate the vector field class, as well as the field type (Polar), and angle...