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Summer is a dynamic time for ice in Arctic waters—melting, drifting, and even forming occasionally. أكثر...

I am working with a number of very large 250m resolution raster files from the African Soil Information Service (AFSIS, http://www.isric.org/data/africa-soil-profiles-database-version-01-2) and would like to learn how to use R to re-project them to geographic coordinates from their original...

I am currently trying to make heatmaps of bird observations in an area. I have had a lot of success making the actual heatmaps for most birds, except the ones that are extremely abundant. I use the heatmaps to find density of the birds per acre at a given point, so it's important for me to get...

Edited to Add: Objective - I have a target GDB "schema" with set feature dataset names and feature classes (no features) within them. I want to copy submittal geodatabase feature classes into that target. I first reproject the target to match the submittal coordinate system. What I...

I have retrieving all types of data from a small B-box using the Overpass Api and i have populated Postgres(postGis) using "osm2pgsql" with the default style.I can extract the ways into geoJson format but in the visualization some layer is drawn twice, possible this depend by relations? This is...

مطلوب GIS Specialist بالقاهرة About the Job Create maps and graphs, using GIS software and related equipment. Meet with users to define data needs, project requirements, required outputs, or to develop applications. Conduct Research to locate and obtain existing databases. Gather, analyze, and...

more troubles in QGIS. I georeferenced this raster in Corrego Alegre UTM23S and loaded up, so project CRS automatically changed to that. So far so good. I need it to be however in WGS84 UTM 23S. None of the two possible ways will do. Enabling OTF reprojection and setting project CRS to WGS84UTM...

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Step #1: Open New Print ComposerQGIS print composer can be a bit daunting and confusing. It is equivalent to the Layout View in ArcGIS, where users can setup their map for printing and publication. One common task is to create side-by-side maps, to compare imagery, choropleth, or other types of...

I am running GeoServer 2.8 WAR on an Ubuntu machine in Tomcat 7. I have GeoWebCache integrated directly and it does cache and serve some tiles. However, in some areas I get errors when I attempt to view the location or seed the cache. The relevant part of the log is as follows (which suggests...

Does anyone know how to create ArcGIS Python Add-in, that will allow after clicking on a feature, open a new window with a few pictures connected with the feature and then let the user change these pictures? I know that it is possible with libraries like Tkinter or QT, or with C#. But Is there...

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I am developing an OpenLayers web application were I would like to incorporate more than one Layer Tree. I have this JSFiddle set up that has a map with multiple layers and one Layer Tree. I would like to duplicate the layer tree multiple times and have a parameter (as per the one in each...

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I have added the Raster support to my PostGIS database program. Now, I need to update all values in the raster (one band only) several times a day. I have found and tested these two options Use ST_SetValues (http://postgis.net/docs/manual-2.1/RT_ST_SetValues.html) Use WKB and do UPDATE...

This is a follow-up on my previous post introducing an Open source IDF parser for QGIS. Today’s post takes the code further and adds routing functionality for foot, bike, and car routes including oneway streets and turn restrictions. You can find the script in my QGIS-resources repository on...

Every summer, EPA brings in students to work, learn practical environmental skills, and enhance their educational experience through our Pathways Intern Program. The Big Blue Thread is proud to feature several blogs written by these summer interns, focusing on what motivates them to work in the...

When the Clean Water Rule goes into effect on August 28, it marks a new era of protection for our nation’s streams and wetlands. We are enthusiastic about the opportunities provided by the rule to improve the process of identifying waters covered under the Clean Water Act and making...

By Kacey Fitzpatrick Looking for your next summer read? Look no further—catch up on the latest EPA environmental science right here! Cooking Up Solutions to Climate Change EPA’s 5th annual Science of Climate Change Workshop program focused on climate science and the impacts of climate...

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