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Is there a way to calculate and visualize displacement vectors in QGIS ? I have DGPS points taken at the same place (ground control points), but their position moved over time as they are located on a landslide. Thanks you in advance ! Best regards, Elise Monsieurs أكثر...

I have 2 tables that are more or less like this CREATE TABLE localizzazione.etichette_sentieri( gid serial PRIMARY KEY, cod_grid character varying(10) NOT NULL, geom geometry(Point,32632), CONSTRAINT etichette_sentieri_cod_grid_fkey FOREIGN KEY (cod_grid) REFERENCES base.tabacco_grid...

currently I am dealing with the creation of a landuse file. I have geoprocessed a google earth .tiff-file over my DEM and created three polygon featureclasses via the editor tool containing areas of a certain landuse. After the conversion into raster files of course the number of rows and...

Bonjour, Je suis débutante dans l'utilisation d'ArcGIS et je rencontre un petit problème pour le calcul de l'occupation du sol dans mes tampons. J'ai donc fait des tampons de 100m, j'ai intersecté avec ma couche d'occupation du sol puis j'ai exporté la table vers excel. Jusque là ça allait...

السلام عليكم اريد خريطة مدينة الحمام ضروري الله يجازيكم الخير أكثر...

I'm interested in locating free GIS shapefile data representing the US Mexican border. I have found a point layer depicting the border crossing points but I'm interested in a polyline feature representing the actual border. Any help would be greatly appreciated. best regards أكثر...

I am working in Openlayers 3. I have been trying to show a *.json (GeoJSON) layer but it doesn´t work and I don´t know why. debug tool shows this message: My code is: Vector layer Thanks, Juanjo أكثر...

I am having problems getting lengths from multilinestrings after transforming data from EPSG:27700 - OSGB 1936 / British National Grid to EPSG:4326/ WGS 84. I'm doing this conversion to import a roads shapefile into a PostGIS database that uses WGS84 as default. However, when I try to calulate...

I'm trying to publish a GP result to both my live and dev servers. I ran the tool, clicked on the result and published to the live server without a problem. Then I clicked on the same result and tried to publish to the dev server, but the analyser complains about a broken project data source...

Set extent to view: var view = new ol.View({ projection: 'EPSG:3857', center: center, zoom: 11, minZoom: 11, extent : [ LeftPointX, LeftPointY, RightPointX, RightPointY...

I've built out numerous network datasets before, so I'm confused as to why I'm getting this error. I've built out a polyline file for the sidewalks in my community. Warning: No route from location "Graphic Pick 1" to location "Graphic Pick 2".Error: No solution found. I can solve a route on a...

I have a point data set where each point has a unique operator associated with it. I'd like to select by attribute = operator name and generate a new shapefile for each operator containing only the points associated with that operator name. Doing this by hand for each operator is simple but...

Bonjour à tous, Je suis face à une colle et j'ai besoin d'un expert en géomatique. Peut être allez vous pouvoir m'aider ?? Voilà, j'ai besoin de recréer des polygones (des rectangles et qq carrés pour être précis) mais je ne dispose que des coordonnées des centroides (X,Y en lambert 93) et...

Bruno Abinader joins Mapbox to help develop the best mapping library for mobile and the web. Bruno is bringing his vast experience working on browser engines like Blink and Servo to the team. He is also a Rust language enthusiast. Follow Bruno on GitHub and Twitter. Welcome Bruno! أكثر...

01 Fordite Fordite, also known as Detroit agate, is old automobile paint which has hardened sufficiently to be cut and polished. It was formed from the built up of layers of enamel paint slag on tracks and skids on which cars were hand spray-painted (a now automated process), which have been...

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I have some geometries as multipolygons and a dem (digital elevation model).I need a line from the max value to the lowest value of the dem for every multipolygon.Is qgis a tool i could use or do i need PostGIS ?How could i realize this problem ? أكثر...

I am using the OGR MapInfo File driver to read a MapInfo TAB file. However, the function GetGeomType() returns 0 which means 'wkbUnknown` even if the features in the TAB are only multi-polygons. Is it because MapInfo TAB can store many different GeomTypes in the same file? If I take for...

I have a large list of coded domains. They are numbers like:01.6530.01, 05.7991.08, 05.7991.01, 05.7991.06 The code will be the exact same as the description. I've tried to make a list using: FRClist = [01.6530.**01**, 05.7991.08, 05.7991.01, 05.7991.06]but it gave me a syntax error on the...

I am looking for an example where there would be multiple map divs containing leaflet maps. When one is panned I want the other one to pan or zoom with it so they are always in sync. أكثر...