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I'm working with the kinematic wave method to determine the runoff of a basin, I am using the explicit method for resolution (The Lax-Wendroff scheme): For example, by using the code in a basin of 625 km2 (the idea is to use the program in much larger basins) with 62000 pixels (or cells) each...

I have a shapefile that define X and Y in meters, not lat and lon. Then I have another file (CSV) that stores points locations as lat and lon, e.g. 30.4, 2.2. I want to load these two files as two layers in QGIS 2.10. First I added a shapefile as a Vector Layer. Then I added a CSV file as a...

In QGIS 2.12 you will be able to create custom grid coordinate annotations (thanks to Nyall Dawson). auto أكثر...

Esri enters a deal with NASA to provide the space agency with geospatial software licenses and maintenance. أكثر...

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By Kacey Fitzpatrick It’s Earth Science Week—a week dedicated to promoting the understanding and appreciation of earth sciences! Below are the latest contributions from EPA scientists studying the earth—and our place on it. Enjoy! Commuting Decathlon Deposition from vehicle emissions is a...

I have a php page that requests reverse geocoding data from Nominatim OSM server. It was working for over a year. Recently started blocking my requests with the following message: You have been temporarily blocked because you have been overusing OSM's geocoding service or because you have...

We're trying to install Esri Maps for SharePoint 4.0 using the installation guide's PowerShell commands. The guide has the following commands: Add-SPSolution -LiteralPath C:\Software\ESRI.ArcGIS.Mapping.SharePoint.wspInstall-SPSolution ESRI.ArcGIS.Mapping.SharePoint.wsp -WebApplication...

I am selecting a lot of polygons within a gigantic polygon by using the postgis function ST_Intersects(). SELECT * FROM data.polygons AS poly, data.gig_polygon AS gigWHERE ST_Intersects(poly.geom, gig.geom)The gigantic polygon is just a (one row) large sized...

I have a map on my Geoserver, which I am displaying via wms and Openlayers. I am using a projection that is optimal for the whole area. However, when zooming in I would like to switch to a different projection which has proved to be best for a particular locality. How can I achieve this? Any...

اليوم نعلن عن مسابقة افضل موضوع جغرافي، حرصا منا على تشجيع الزوار والطلاب والأساتذة والكفاءات العربية في إعداد المواضيع والمقالات الجغرافية، فيكون الهدف الأولى من هذه المسابقة أن يتنافس فيها كل من يهتم بمجال الجغرافيا من العرب ويشاركون معارفهم ومكتساباتهم مع اشقائهم العرب في جميع ربوع الوطن...

I know how to make a simple web map with markers and attribute data (let's say a name of a person at a location). What I don't know is how to add a search bar where the user can type the name and the map highlights that marker. Does a tutorial exist for this (Mapbox or CartDB, either one is...

"Load as new layer" in QGIS database manager frequently refuses to recognize INT and REAL columns as such - they are converted to TEXT in the new layer. Is there a solution to this in the DB manager? I would prefer not to create new tables, etc. just to convert the field type for simple...

I have an image from a Canon SD110 NIR camera, which I can import in RAW (CR2) into QGIS. However, I am finding it difficult to know which band represents which 'colour' output. According to the manufacturer it provides 'green, red and nir'. Do those bands hold true for any software...

I have many sampling points in mangroves of Southeast Asia and am trying to extract climatic data for each using the WorldClim dataset. However, many of the points fall on areas classified as "water" for which the WorldClim dataset values do not exist. How do I adjust each of the point long/lat...

مقدمة في ظل ما تعرف المجالات الريفية من تهميش، وغياب أية تنمية بيئية واجتماعية واقتصادية لهذه المجالات. قامت الدولة بإنشاء مؤسسة تابعة لها، من أجل تنمية هذه المناطق. ومن أهم هذه المؤسسات نجد المكاتب الجهوية للإستثمار الفلاحي و التي بلغ عددها 7 مكاتب على المستوى الوطني. سنكتفي بدراسة...

Google Crisis Response provides a variety of tools to assist with crisis response efforts around the globe. One of the tools it provides is maps which often include satellite imagery of relevant areas well before the imagery is available in Google Earth, and sometimes includes imagery that never...

Bonjour, J'ai un petit soucis au niveau du suivi du modèle conceptuel de données du plugin cadastre et n'arrive pas à établir le lien entre la table "parcelle" et "geoparcelle" Mon but étant lié à la conversation "plugin cadastre - rapatrier les données propriétaire" postée le 1 juillet...

Why does ArcGIS Desktop 10.2 add a "Shape_Length" field after running processes I'm unable to delete the field after as well. It isn't accurate either. أكثر...

I am trying to convert a 13 character UNIX timestamp to datetime and I am getting a year that is in the 44000's. I'm not sure what I am doing wrong, hopefully someone can help. library(maptools)GMT