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I want to conduct Ground synchronization of VIIRS. unfortunatelly,I don't know how to acquire its overpass. Please help me . Thanks Li أكثر...

I use the importer in Geoserver to import a KML-file. The KML looks like this: plz5 01067 0100...

We have a 1-meter LIDAR DEM from a city. A small subset can be downloaded from this link: This screenshot shows raw DEM with gray palette (darker belts are streets, and greyish and whitish rectangles are blocks): This correspond to a place in Santo Domingo city, which can be seen in this...

I am trying to process photos taken with a tetracam ADC micro camera placed on a UAV. I have GPS coordinates and mavlink logs providing roll, pitch and yaw of the UAV. I am having a real hard time georeferencing and orthorectifying the pics using tools as ossim or grass. Has anyone done...

Topographic Wetness Index can be expressed as Ln(a/tanB) based on the idea of Beven and Kirkby (1979)where a is the spesific catchment area (a=A/L, catchment area (A)divided by contour lenght(L))and tanB is the slope The basic idea here is simple, but as there are multiple ways to...

I am new to spatial analysis, and trying to follow this tutorial to generate a topographic wetness index for my area of interest: http://gracilis.carleton.ca/CUOSGwiki/index.php/Generating_Wetness_Indices_for_Watersheds_in_GRASS I got as far as generating a flow accumulation map, but got stuck...

i am currently working on a project which involves the quantification of the wetness in certain areas. However it produces quite different results from what i expected. I'll describe the steps i have taken.To do so i used the ASTER global DEMv2 and clipped it to the parts to be examined. I have...

مقدمة : يعتقد البعض إن الجغرافيا قديما بقدم الجنس البشري فمع مرور الزمن سمعت المجموعات البشرية المختلفة للعيش بتناسق مع وسطها البيئي الطبيعي من خلال اكتشاف الأماكن التي تتوافر فيها متطلبات الحياة الأساسية (مثل المسكن والملبس والمأكل ) بهدف اتخاذها كأماكن استقرار وأمان كما دفع حب اطلاع المجموعات...

Yesterday Google released Edition 2 of the ‘Voyager layer’. As we did for Edition 1, today we are having a more detailed look at the ‘Satellite imagery updates’ sublayer. The layer itself does not give any dates as to when the imagery was added to Google Earth. As of this writing some of the...

Bonjour, je possède des fichiers raster à l'échelle d'un département: soit plusieurs fichiers mon but est de ne garder que ceux qui se trouvent dans une commune précise j'ai utilisé le menu Raster/ Extraction / Découper seulement dans le fichier source, je ne peux choisir qu'un seul raster or...

Welcome to Geoawesome Quiz number 41. Today we’ve got for you a real geeky test. Try to recognize these train stations based on photos. It won’t be easy! And of course if you had fun please check out our other GeoawesomeQuizzes! Can you recognize train stations based on photos? DID YOU LIKE...

I have a TIN-model created from 1800 xyz-coordinates (that I also have). There is an pipe leading all the water in and on for all the water out. I would very much like to simulate movement of the water under different volumes of water flowing into the system.Any bright ideas? I already tried...

This question is an exact duplicate of: TPIchallengeswetlands [on hold] Can anyone please help me in executing Topographic Wetness Index (TWI). I have qgis 2.8 integrated with TWI algorithm. I have been unsuccessful many times. A simple pdf to execute...

I have a big raster file (129600 by 64800 pixel) with global water bodies (1 bit values 0 and 1) and try to extract ocean and inland water shorelines. I've tried with ArcGIS and QGIS to convert from raster to polyline, but it takes ages. Does anybody know a better/faster way (Python or R) or a...

have ortophotos of an area that I need to serve as a baselayer of my map in openlayers, i'am using geoserver and php5. i have 15000 files (1000MB each) in raw TIFF format with corresponding TFW word file - 15Tb of data. Coordinate system is EPSG:4326 (wgs84). on geoserver there is...

Unfortunately I am having a problem executing this algorithm. It says input layers are not in the same grid extent. I have been exhaustively trying to get this right. Please help. I am using Qgis. 2.8 . Can anyone please provide with instructions of how to execute topographic wetness index...

I am trying to make a 3D web application which should be able to render 3D buildings (I will be using Cesium, but that is not that important for now). I basically have a database consisting of the 2D geometry of the buildings and the height, amongst other things. In that way I should be able...

In arcpy, I'm trying to join an list of .csv files with data of emissions per country, with the attribute table of a raster in order to make lookup tables later on. So far this is my script: ras_countries = "E:\\eco_services\\data\\EU_28"arcpy.env.workspace =...

Can I disable a column based on another column? Let's say I have a column to choose a field type (Short, String and so on) and a second column to choose the max length of a string. I would like to disable the second column if I've chosen a short instead of a string. param =...

Salut, Je vous transfère une enquête lancée par la communauté QGIS pour mieux cerner les attentes de ses utilisateurs et contributeurs. Le questionnaire est très court, je vous encourage à prendre quelques minutes pour y répondre. ---Citation--- Bonjour, Le PSC de QGIS a... أكثر...