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I'm actually trying to convert one raster into a SpatialPolygons. I've got a big raster (12 millions pixels) with a lot of zeros, and some negative values (representing some depression in a DEM). I would like to cluster all these negatives values into polygons, to get a map of all the...

On September 16th, 2015 a magnitude 8.3 earthquake struck just off the coast of Chile. It was more energetic than the Nepal Earthquake earlier this year, but resulted in far less casualties because Chile has more frequent large earthquakes and is better prepared. For the Nepal Earthquake we...

Bonjour, impossible d'ouvrir l'extension "Géoréférencer" sous QGIS version Pisa, bien que l'extension soit activée. J'ai eu beau effacer toutes mes anciennes version de Python et réinstaller QGis, rien n'y fait. Je soupçonne une interaction négative avec Grass (ma version de QGis n'arrive pas...

http://www.arabgeographers.net/up/uploads/14431706751.pdf أكثر...

السلام عليكم ورحمة الله وبركاته صورة: http://www.arabgeographers.net/up/uploads/14431677181.jpg (http://www.arabgeographers.net/up/) أكثر...

السلام عليكم ورحمة الله وبركاته فى الوقت الذى يتسارع فيه بناء ما يعرف بسد النهضة الأثيوبي تحفر مصر قناة بحرية على حدودها مع قطاع غزة ، لا أعرف من... أكثر...

السلام عليكم ورحمة الله وبركاته لم يمر فى تاريخنا العربي الالكتروني موقع بقوة وروعة مركز الخليج لرفع الملفات ، هذا الموقع التيرا عملاق استوعب... أكثر...

I want to create .shp file using ogr with georeference based on my raster file, so i create an ogr layer using CreateLayer( "point_out", NULL, wkbPoint, NULL ); i want to set the OGRSpatialReference variable from NULL to to my raster file's georefrence, all i know to get raster file georefrence...

Is it possible, and if so how, to use multiple logical filters in a wfs request? For example I have a attribute, type_id that should be 1, 2 or 3. var wfsTypeFilters = [ new OpenLayers.Filter.Comparison({ type: OpenLayers.Filter.Comparison.EQUAL_TO, property: "type_id"...

I'm new to ArcMap & gisSE so go easy on me. I've successfully added a few keyboard shortcuts to ArcMap 10.2.2 on Win7. However, I've mapped Zoom to Layers to a hotkey (F5) This shortcut shows up in the right hand side of the menu layers >- (layer name) >- Zoom to Layer, but hitting F5 does...

it is my second day on PyQGIS. Not sure why layer doesn't return anything. Anyone can help me on this? Code: #!/usr/bin/pythonfrom qgis.core import *from qgis.utils import *from PyQt4.QtCore import *def main(): qgis_prefix="/usr" QgsApplication.setPrefixPath(qgis_prefix, True)...

I am creating web application that need to have the following functionality: display polygonal features on the map (about 20-50 Mb if GeoJSON) on click on feature - select them and view names selected features on click on selected feature - unselect this feature and receive names only selected...

Despite only having one 'layer style' defined in Mapbox and this working correctly in the Mapbox browser, when this is taken through to Leaflet it appears that any other layer styles I have previously used are also 'stacked' at different scales of the map. A JSFiddle of the issue can be found...

I have to read a large number of MrSID images and process them in Python. I usually access GIS file formats using the gdal application and the gdal Python library. However, the gdal package for Python does not come with MrSID support (I use the portable WinPython and the precompiled gdal package...

I am using Operations Dashboard of ArcGIS and I would like to add a widget which count the occurrence of a text value "DAMAGED" in a field ("STATE"). I only found the way to access numeric attributes, but not text ones. I also tried with the widget "Interrogation" (I hope the traduction is...

I would like to know how exactly QGIS Geometry tools -> polygon centroid is calculating the point coordinates. For example does it divide the boarder of the polygon into small points, take two pairs of two points (length and width) with maximum distance and take the crossing of these two lines...

I am looking into postgis to solve path planning problem.If someone could give hint on that matter it would be great.So problem is following: given a specific bounding box, plan route inside box(eg. snake move) to cover all of the box taking into account distance between two side closest paths...

I'm using QGis 2.10.1Is there a way to avoid that labels of different layers overlap eachother? أكثر...

is it possible to place a label automatically outside its polygon? أكثر...

I'm using gdalwarp to clip a number of geotiffs (tiles of a larger map) to a polygon described by a shapefile (which is about the size of the overall map, i.e. much larger than individual tiles) using: gdalwarp -of GTiff -cutline shape.shp -crop_to_cutline tile.tif cropped_tile.tif(where...