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LIDAR is an important technology that is undergoing continuous and expansive growth and predicted to reach $1 billion by 2020. A recent report also describes ongoing developments in LIDAR in Europe. NOAA has a great one-hour Introduction to LIDAR that I recommend checking out...

This is what more than 900 million Wifi routers and cell phone towers looks like. That’s one router for every 8 people on earth, all captured from Skyhook. This is more points with attributes than I’ve ever put into a set of vector tiles before, but distilling big data down into...

I have a couple of Landsat 7 images and they all have striping as a result of the SLC failure. Does anyone have any suggestions as to how to destripe the image using ENVI? I plan to use these images for NDVI analysis. When I downloaded the data from GloVis, it also came with a Gap Mask...

I have a shapefile with a few thousand polygons, ArcGIS [9.3] (and even PostGIS). I would like to export each of those polygons into its own thumbnail image file without any real context. What is the best approach? أكثر...

In 2015, wildfires in Alaska consumed an area nearly the size of New Jersey. أكثر...

Weather systems give a cyclone-like look to a vast dust storm in the Middle East. أكثر...

I'm creating a system that pulls Longitude/Latitude data from the MapQuest hosted Nominatim service. I'm using OpenStreetMap/OpenLayers to display markers on a map. In order to compute the location to place the marker, I use the following code: var location =...

I just installed QGIS 2.8 Wien to get access to Openlayers (I could not install it under 2.4, and had to uninstall completely and reinstall 2.8). It was working apparently, but when I tried to get to the Openlayers, it was not in menu Web, as I found in this question Open Layers Plugin not...

I've downloaded the street data from OpenStreetMap (OSM). I'm looking for speed limit attribution and OSM seems to be the only source for my jurisdiction (Ontario, Canada). The problem is, the speed is stored as a 'tag' and when I download the .osm file and convert it to .shp using geoconverter...

How can one use the displacement link table created for use in the interactive Spatial Adjustment toolbar with the Rubbersheet Features geoprocessing tool? The toolbar method uses a text file of displacement links, following pattern of ID Source X Y Destination X Y: 1 905653.9545...

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In 2015, wildfires in Alaska consumed an area the size of New Jersey. أكثر...

RiCOPTER, RIEGL’s ready to fly remotely piloted airborne laser scanning system (equipped with the survey grade VUX-1 LiDAR sensor), was unveiled at Intergeo in Berlin last week with great excitement! RiCOPTER is a high-performance UAV which can be equipped with the RIEGL VUX-1 survey-grade LiDAR...

Bonsoir, Nouveau dans le SIG et utilisant Qgis, je viens d'installer Qgis 2.10.1 pisa. La prise en main se fait plutôt facilement, hélas j'ai un problème au niveau des plugins et des dépôts d'extension. Voilà, mes dépôts d'extension sont tous indisponibles... Même problème lorsque je veux...

I want to add the MapBox Satellite basemap layer as an option in my ArcGIS Online web app. There is a widget that allows users to toggle between basemaps and I would like MapBox Satellite to be an option there. Is this possible? I know the URL JOSM is using to display it is this...

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According to ESRI documentation about Making NetCDF Raster Layer: To create a netCDF raster layer from a netCDF variable, the spacing between x-coordinates must be equal and the spacing between y-coordinates must be equal. If the coordinates are unequally spaced, create a netCDF feature...

I've got a polygon (a Circle) with a certain size. I want to put points inside it, as much as I can, but with a set of rules : Points can't be near each other, up to 500 meters. Points can't be near a polyline (roads) up to 200 meters. Any idea how can I do it with ArcMap or Qgis ...

<div dir="rtl" style="text-align: right;" trbidi="on"> مدخل أفريقيا جزء لا يتجزأ من قارات العالم القديم، إلا أن كشفها كشفًا علميٍّا تأخَّرَ كثيرًا حتى أوائل هذا القرن، ولكن هل ظلت شعوبها قابعة في أوطانها لا تحاوِل استجلاء البقاع المجاورة لها من أرضأفريقيا؟ هل ظلت الدول التي نشأت في القارة...

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 interns, focusing on what motivates them to work in the...