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This is my code of python in qgis from qgis documentation docs code -uri = QgsDataSourceURI() -uri.setConnection("localhost","5432","gis_data","postgres","vajja") -uri.setDataSource("","poi_sv1","long","","lat") -vlayer = QgsVectorLayer(uri.uri(),"LayerName","postgres") -crs =...

I have a shapefile polygon i am using to clip some data (a multipatch shapefile). Although both are in the same projection, units same and extent matching units yet clipping has failed. Can i get some help, please أكثر...

I have a table with X, Y (long, lat) coordinates I wish to add to an existing Spatialite database. I am led to believe I need to create a geometry column specifying SRID 4326 when using long, lat. I have successfully imported the table and created the geometry column using help from here...

I saw in How to correctly install QGIS 2.8.3 with GRASS plugin on Ubuntu 14.04? how to get Qgis 2.10 running from the non ubuntugis repository with grass features but I'm still having problems with getting it to work with the ubuntugis unstable dependencies. I have tried using 2.10, 2.8.3, and...

Transparent layers are not displaying correctly in ArcMap 10.2 or in exported maps, but they do print OK. They look like this: The weird thing is - the transparent layers displayed fine a few weeks ago, and all of a sudden I opened the document yesterday and they don't. I exported .jpg maps...

I have python code that I want to turn into a script. I want the end user to be able to navigate to the feature class the code should be run on. The code I have currently speaks to a specific feature class and doesn't allow for picking what feature class the code is to be run on. How do I...

I have a map of US zip codes and a spreadsheet that associates data with specific zip codes. I want to show the zip codes where the most data exists using a gradient, but I am not even sure how to get it onto the map in the first place. أكثر...

I have a shapefile that represents contours. Because I have clipped the contours to the map boundary they are broken in several places. Now that I have labeled the contours there are labels that are repeated for the same value, for example, the 0.1 contour interval is broken is several places...

In tutorial, you will see how to use illustrator to manipulate a map. أكثر...

Five Ways to Extend the Value of GIS Across Organizations, Communities, and the World Big things are happening in the world of maps and mapmaking. A convergence of technology and social trends has pushed geographic information systems (GIS) onto the Internet in a significant way, and the vision...

I’m pleased to announce the latest release of Portable GIS. This version (v5.2) has only a couple of changes: QGIS 2.8 (I’m going to try and do a release to coincide with each long-term release of QGIS) Loader has been updated to the latest version You can download the setup exe and the md5...

Summary: In a paper released today in Science, a new model presents a common mathematical structure that underlies the full range of feeding strategies of plants and animals: from familiar parasites, predators, and scavengers to more obscure parasitic castrators and decomposers...

I have a table with 300+ routes. Each route (in text) lists 4-5 street names where the route should take place. I would like to create each route, that is, plot the street names and link them to a vector feature show only the parts of the street that are within the two neighbouring streets...

In my project, I need to calculate each village's distance along a route to a seaport. However, as you can see in the picture, not all the villages are connected to roads already, so, first of all, I need to create the shortest path from each village to the road. Since there are more than 400...

I would need to know the GSD or grid size (resolution), in meters, of a raster created when working in a Geographic coordinate system in ArcGIS. Is is possible? Even better, can I set the Cell size of the raster in meters (not in degree units) when I perform the raster creation if I am working...

The Urban Atlanta Geospatial STEM Academy provided a fun and free space for students to learn about geospatial technologies. أكثر...

Esri maps show that 75 per cent of all cycling injuries recorded last year happened within 30 meters of a junction or roundabout. أكثر...

Agencies at all levels of government are making data visualization an integral tool for a growing array critical missions. أكثر...

Gloucester County teamed with Timmons Group beginning in late 2014 to convert their GIS data to an Esri enterprise system. أكثر...

The county's GIS office spearheaded the GIS Road Centerline Data Collaboration project to create a standardized metro-wide road centerline data model. أكثر...