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Summary: Scientists are expecting that this year’s Chesapeake Bay hypoxic low-oxygen zone, also called the “dead zone,” will be approximately 1.37 cubic miles – about the volume of 2.3 million Olympic-size swimming pools Low river flow and nutrient loading reason for smaller...

Image: http://i72.fastpic.ru/big/2015/0623/d6/0b8b6083f7e602848281ec2d438025d6.jpg *GraphicRiver - Double Exposure Action v.2 11646833* Photoshop... أكثر...

Hello, My name is Enrique, and I am designing an eolic wind farm for my final degree's project. I have managed to create a .gmw or .dfx with... أكثر...

Image: http://i71.fastpic.ru/big/2015/0623/3b/5e381f373084a57a0284fcac70a9a33b.jpg *GraphicRiver - Zoe Double Exposure Action 11850176* Photoshop... أكثر...

I have a KML file which has multiple small lines (19,000+). I need to be able to figure out the total length of all tracks combined. The length of... أكثر...

I have to work with numerous Landsat surface reflectance product that I downloaded from http://landsat.usgs.gov/CDR_LSR.php. The product comes with a QA data with information on clouds and shadows that can be used to mask the data. Has anyone here used python to apply these mask or know of any...

I work daily with shapefiles that are quite large in number of features using ArcGIS. Sometimes I am able to perform operations (joins, selections, exports, etc) on these shapefiles (though they do take quite a bit of time to run- usually ~5 to 10 minutes) and sometimes I am not. I am working in...

I am applying symbology to one layer from another layer I am using the arcpy.ApplySymbologyFromLayer_management esri apply symbology link I have a series of layers that I would like to symbologies in the some way. MY TEMPLATE SYMBOLOGY ( the one where I am taken the Symbology from ) 1-100...

I have a raster where each pixel is a particular vegetation type. I'm interested in the diversity of vegetation types around each pixel. I'd like to assign a Shannon's diversity index value (see this link for equation: https://en.wikipedia.org/wiki/Diversity_index#Shannon_index) to each pixel...

Summary: Animal feeding operations have measureable effects on stream water quality in many agricultural watersheds in the North Carolina Coastal Plain, according to a new report by the U.S. Geological Survey Contact Information: Stephen Harden ( Phone...

We’re building Mapbox GL for mobile and web simultaneously, and in addition to last week’s release of Mapbox GL for iOS, we released Mapbox GL JS version 0.8.1, with some exciting new features, including perspective mode: Perspective mode. Mapbox GL JS now allows you to control the pitch of...

Good day. Can anybody provide a simple code to be run in the Python Console of QGIS (I am using 1.8 Lisboa) to generate X number of random points (say e.g. 5000) over a certain global shape of polygons (all Vector data). I then need to count the number of points per polygon and calculate the %...

I'm working on generating a water feature layer that eliminates a lot of the swamp/marsh areas in my county. Using raster analysis (iso unsupervised cluster, majority filter, boundary clean, etc) and converting to a polygon, I now have a layer that more accurately depicts surface water...

I'm fairly new to Leaflet and just managed to use Leaflet marker-cluster with a JSONP WFS which provides my data from Geoserver. Now I would like to have a popup for my markers by mouse click. But I do not know where to insert the .bindpopup onEachFeature.Maybe I have to rewrite my code, but...

[Basic]QGIS – Working with Attributes – Open Attributes table – Select by Expression – Zoom to select features أكثر...

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The 29th Annual Children’s Network Conference takes place on Wednesday, September 23rd and Thursday, September 24th, 2015 at the Ontario Convention Center. The conference has dynamic keynote speakers, a wide array of workshops to choose from, and an exhibit hall filled with a variety of...

Summary: How do urbanization and agriculture affect the health of Puget Low­lands and Willamette Valley streams? Journalists are invited to meet up with U.S. Geological Survey field crews as they work to find answers by assessing aquatic life in 88 streams in 10 days Contact...

I have successfully converted a polyline fc with 1,780 records into a polygon fc in ArcGIS 10.1, by using the tool: Feature To Polygon, but the output does not keep the attributes of the input fc (I have checked the optional button to do so) Then, I found this solution...

I would want to put on a qgis map some historical sites to check at what degree they are aligned. Distances between edge points: from 100 to 4000 km.Starting from lat/long points, what would be the most appropriate map projection?What are the parameters to set in a custom crs in qgis?Any...