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I'm am having some trouble plotting my spatial data using ggplot2. The map looks fine when plotted using spplot, so I'm assuming that the tearing occurs at the fortify stage. The code is as follows: #install the...

My current Project is to "map" a turntable in qgis. I know, very unlikely but that's what my teacher wants. My teacher also wants me to measure something in this project (Very specific, isn't it?). And that's where the problem starts. Qgis wants me to define geographical coordinates or...

I am still a beginner in learning GeoServer and OpenLayers.I tried to create thematic maps of the map that I publish in GeoServer. I used openlayer to show the map in web browser. When i want to create thematic maps based on data from the attributes that I have, I find the color constraints of...

I'm having troubles finding the band count for my raster files using ArcPy. I need to first list all the raster files in a directory, and then display the band count for each file. I am able to list the files, but when it gets to the band count, it gives me an error stating that Method Band...

High precision mobile useEsri is embracing high-precision GPS in consumer devices and is working on integrating output from consumer-level drone technology. This could bring huge benefits in location accuracy for projects involving mobile data capture, such as onshore oil field operations or...

Can anyone help me to convert this function so that it is not dependant on the ol3-debug file as I don't know quite what is replaced upon build. The function works but only in debug mode. It is in reference to this question: Sketch event in Openlayers 3 drawing interaction The intention is...

I'm not quite sure how to phrase this so apologies if it is a duplicate. I have a project that uses a series of lines created from the boundaries of polygons overlaid onto a map in QGIS. I understand how to use QGIS to create a point layer with the centroid of the initial polygon before it is...

I'm working on localhost:8080 and want to get WFS data in a Leaflet map.So, I've read in some posts here that I first I have to enable Jsonp in my web.xml file in Geoserver.So I put ENABLE_JSONPtrueBut I can't see that Jsonp is allowed with a getCapabilities : text/xml...

First time using grass. I need to convert DN to reflectance. Imagery -> Sat. images tools-> i.landsat.toar. But when I add raster name. I get error. Im using landsat 8 images WARNING: WARNING: ESUN evaluated from REFLECTANCE_MAXIMUM_BANDCalculating...ERROR: Unable to open header file for raster map

I want to join a 100*100m Grid with a point layer. The points contain the number of people living in the grid cell. There are some cells with no polulation, which I want to keep with the Attribute "pop_count = 0". My SQL-Query unfortunately gives back only the cells in which the attribut >0...

<div dir="ltr" style="text-align: left;" trbidi="on">إليك أربعة أسباب تساعدك في فهم كيف يتم تصميم الاعمدة المائلة او الاعمدة الفرعونية إضافة إلى مرجع مهم في تصميم هذه الاعمدة التي تضيف شكلا وطابعا خاص للمباني 1- الربط للاعمدة يتم من خلال بلاطة Flat slab ولا يوجد (Drop beam) تربط الاعمدة وفي...

Bonjour, J'ai un petit soucis et j'ai beau cherché sur le net je ne trouve pas la solution appropriée... Dans une requete j'ai plusieurs champs calculés : Q1, Q2, Q3, Q4, Q5, Q6, ces valeurs sont "attachées" à un champ "reférence" Je souhaiterai identifier la valeur minimale parmi ces 6...

I'm trying to solve a issue by comparing 2 geometric networks with each other. We have a node base coax network, and I want to trace the production network per node and compare that to our new changed and completed (not yet production) network. I managed to create the two geometric networks...

How to set transparency per polygon in a shapfile in QGIS? For example: a polygon with field "value" = 1 should be fully transparent whereas field with field "value" = 0.4 should have a 40% transparency value. The color of the polygons should depend on another field. Preferable I would do this...

I'm trying to get the newest version of Postgis (2.2.0) up and running with Postgres 9.4. I'm using Windows and the only installation manuels I found, are Linux-only. Can anybody point me in the direction of a useful Windows-installer? أكثر...

we have self developped application based on ArcGIS 9.3.1 SP2. Our agents use that application to edit parcels. The parcel layer has a field "SHAPE_AREA" that is calculated by ArcGIS. Our application gets the value of the field property to show the area of the parcel. However we see now that the...

I need to create a geometric network in my network dataset which resides within my file geodatabase. I have been receiving the following error: Cannot create geometric network. The selected feature dataset does not contain any feature classes which can participate in a new geometric network...

Leveraging ArcGIS Python API أكثر...

No transformation is visible after using SetGeoTransform to the dataset opened from a *.tiff file: ds = gdal.Open(filename, GA_ReadOnly) # open the raster data set geo_transform = (0.3,10,30,-10,80,-1) # complete random/arbitrary numbers ds.SetGeoTransform(geo_transform) cols =...

I have carefully readen the USGS website, but if you have to download more than 100 tiles it becomes complicated. They propose a website http://earthexplorer.usgs.gov/filelist but how we can provide a list to charge the tiles we want? A text file? If somebody can show an example that would be...