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Probably I just don't understand the API documentation, I don't use object oriented programming to its full capability. I do see this has to be done from a composer object in order to automatically apply the on-the-fly projection transformations since the input layers have different CRSs...

I'm having trouble locating any discussion or comparative benchmarking of different raster file formats (e.g., for use in data analysis in R). Does anybody have any insight into why particular formats may be faster or slower? Or should the differences be minimal? Specifically, I'm interested in...

How can Planet Labs' mosaic Tile Map Service (TMS) be used with GDAL like in the Open Layers example? The API requires authentication and other specific settings. أكثر...

The larger goal with this code is to create a temporary polygon based on the calculated coordinates (which it does), then to see if the polygon intersects with the "unobscured_FC". After I run the select by location the polygon will be deleted, and all sorts of other hilarity will ensue. I only...

I am trying to use os.walk to go through a directory tree, pull out all the .shp files in it, create a grouplayer in the mxd, rename the grouplayer the folder name, then add the layers from that folder to the group. This is because I have a lot of folders with files in them that represent...

salut cher membre. je suis nouveau dans l'utilisation de QJIS, je voudrais faire apparaître des localités dont j'ai les coordonnées dans un fichier excel sur une carte. merci de me venir en aide et de m'expliquer le plus simplement possible car je m'y connais pas vraimeent أكثر...

bonjours cher membres, je suis nouveau tant dans ce site que sur l'utilisation des SIG. j'aurais besoin de votre compréhension et de votre aide si possible pour m'y connaitre. merci - - MISE A JOUR - - je voudrais déjà faire apparaitre des localités sur une carte. j'ai déjà les coordonnées...

السلام عليكم ورحمة الله وبركاته مكة قبلة وعاصمة المسلمين على هذا الكوكب تعرض حجاج بيت الله الحرام فيها لحادث عرضي بشع تسبب فى استشهاد العشرات من... أكثر...

Several weeks ago, we added the World Land Cover 2010 ESA layer to the Living Atlas. This layer’s data is from the 2010 epoch of the European Space Agency (ESA) Climate Change Initiative (CCI) Land Cover Project. These data are raster format at 300-meter resolution and represent 36 land cover...

So I have a directory of shapefiles used to store some spatial data, and I'd like to find a way to export this directory to an mxd such that every folder is replaced as a group layer, but preserving the hierarchy of it all. The directory looks like this: I've got a good handle on how to...

I'm trying to add the Raster Calculator to a model I'm creating using the Processing Modeler of QGIS 2.6 Brighton. It does not allow me to add the normal Raster Calculator tool under Raster, so I tried using GDAL Raster Calculator tool but it only allows me to include 6 layers into the...

Is there a way in which a route mapping interface can determine how many points a certain (user created) route has 'touched'? In the sense that firstly: I have a set of markers or points (e.g. geojson format) I have a route from A to B. How many of these pre-determined points does route A to...

By analyzing satellite images of sediments, both floating and on the seafloor, coastal researchers and cartographers can identify potential shallows, shoals, and other shipping hazards. أكثر...

I have a geojson file (tide_gauges.geojson) {"type": "FeatureCollection","crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } }, "features": [{ "type": "Feature", "properties": { "NUMERO": "10569", "MAREGRAFO": "COCALZINHO", "FICHA": null }, "geometry": { "type"...

This question already has an answer here: Finding footprint data for US buildings? 4 answers Does anybody know where I can find a database containing all (or a large percentage of) structures in the...

I'm using leaflet and trying to add a popup to a point on the map that will return a property of the point from the geojson file. Going off this post has been helpful problem adding pop-up to GeoJSON layer in Leaflet , but it only returns the same text for each point. Here's part of the code...

How can I change the data type in an attribute table in ArcGIS for multiple fields? For example, if the fields have been exported as a string from Excel, and I would like to use them as numerical values? أكثر...

I have created a IDW heatmap using QGIS 1.8.0 and need to import the raster into PostGIS 2.0.1. QGIS saves the raster layer as a .asc file. How do you import the raster into PostGIS as a Raster? What format should QGIS save the raster as? Can pgAdmin's PostGIS Shapefile and DBS Loader be used...

I have published an ArcGIS service based on a MXDI have generated the cached tiles on a shared NAS.When I access the Map Service with the build in js admin viewer (http://SERVER/arcgis/rest/service/....) The map display quickly but, every now and then no tiles are coming for maybe 5 seconds...

Are there any sources for free and distributable building footprint datasets for major cities around the United States? Ideally, the data would also have the number of stories of each building; is that available as well? I'll give you an idea of what I'd like to do: I want to estimate...