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It is fire season in the western states of the US and one recent fire in California has been named the fourth most destructive in California’s history. US president Obama has declared it a major disaster. We have looked at a number of resources for tracking wild fires in the past. The best ones...

In QGIS on a new layer I'm trying to calculate the area of certain landtypes individually from a Grounds Maintenance layer. Previously I have used the following expression in Cadcorp SIS: CalcInterior(Overlay('Grounds Maintenance',{Landtype$='Grass'}),'_area$',1) Which works fine in...

Does anybody know how to change or set the "Description" option/tag of a GeoTIFF file using GDAL? To specify what I mean, this is an example of gdalinfo return from a GeoTIFF file with set "Description": Band 1 Block=64x64 Type=UInt16, ColorInterp=Undefined Description = AVHRR Channel 1...

I'm looking for ways to convert a raster image of a floor plan to workable data in a sense that the program should be able to locate the destination by referring to the co-ordinates of matching "ID/name" on the map. I have searched for more information in regards to the topic and have found many...

I would like to change one field values into negative (i.e. original column, row 1 = 5, new column row 1 = -5 in a feature class list. I got until the addfield and calculate field mngmt functions, but it is not clear how to the the negative transformation. ARCGIS' help page has some...

I'm using QGIS 2.8.3-Wien in an Ubuntu14. My problem is the following: I'm using the OpenStreetMap tiles to draw maps of some specific regions. The problem is that, for some urban/rural regions, these tiles offer very little information at non-urban regions. By using the OCM Landscape...

I have a widget that adds a WMS layer to my Flex Viewer app. I use proxy. I would know to want which event is fired when layer really ends loading and shows up on map. I tried many, but they dispatch too early (when the layer object is added to map, e.g. LayerEvent.LOAD) and if I choose big...

In open layer 3.9.0 .I have default scale for open layer 3 but what user want is able to set the scale like 1:2000 or 1:5000 and so on using dropdown select box. something like the image below. أكثر...

I am trying to change a field name in featureclasses (shapefiles) using AlterField_management, however I receive the following error message: Runtime error Traceback (most recent call last): File "", line 14, in File "c:\program files...

I want to set the extent of my basemap on application start but when I add the following code it doesn't seem to like it and renders a blank div? map = new Map("map", { logo: false, extent: new esri.geometry.Extent("xmin="-377930, "ymin"=470972, "xmax"=849893, "ymax"=1269406, new...

When creating orthos in Erdas imagine or LPS from geoeye-1 (or other) satellite images having _rpc.txt files, which are referenced in WGS84 generally, what should be the projection of the used DEM? If there is projection information in the used DEM and differs from WGS84, does erdas first...

I have some issues with orthoresampling images in ERDAS Photogrammetry (formerly LPS). I've set up two different image blocks (including orientation and camera paramters) and created multiple digital surface models by semi global matching to use for orthorectification. These DSM have been...

Can I use Erdas LPS 2011 for automated*DSM*generation with low resolution (5m to 15m) by one aerial image? I don't have a stereo pair images for the city. أكثر...

I'm a new ERDAS Imagine user, so it's probably a beginner problem I'm facing: I get negative elevations in my DTM after automatic tie points setting.. I am geo-referencing a stereo-pair of ASTER images to a reference image (with x,y,z, coordinates) in order to generate a DTM from them. When...

It getting really irritating to find that every other functionality , external command (workflow), workflow tool or utility am trying to involve in GE or GVH are unsupported or never work. And its more frustrating bcoz I am following documentation where it is mentioned about new added or...

I'm working on a photogrametric project with erdas LPS version 2013. I succeed in taking several ground control points (x and y values). However, i can't extract and load Z values from my raster DEM data Reference. The Z field remains empty... COuld you throw light for me? أكثر...

Is it possible to use the .NET Entity Framework with PostGIS? I've reviewed a few options, including hookup it up with Npgsql using http://npgsql.com/index.php/2009/08/how-to-set-up-entity-framework-npgsql-part-1/, but it appears that the data types in PostGIS are unsupported in Entity...

My plugins crashes with "No module named qgsprojectionselectionwidget" in Windows My Python QGIS plugin works on Ubuntu (at least for me, and all fatal bugs reported so far are solved), but when I run it on QGIS installed from the official 2.10.1 64-bit installer for Windows (on Windows 7...

I have a grid of data that is in a gnomonic projection, centered on a lat/long point (WGS-84). The grid has a 1km spacing. Given this I can easily obtain the x,y coordinates/distances from centre point where the latitude and longitude is known. What is the best way to obtain the lat/long for...

Over 107 were killed and 200 injured as crane collapsed in Mecca on 11 September 2015. UrtheCast releases satellite images of crane collapse. Image was captured by UrtheCast’s Deimos-2 satellite on 17 September 2015. Satellite image shows the exact location where the crane collapsed. Every year...