Raster is a data format consisting of regular grids of values, usually stored in an image-like format.

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Raster calculator error 000539 - cannot create weak reference to 'classobj' object

I was - like many times before - trying to clip a raster with the raster calculator (raster * 1 with shapefiles as mask). Now - the following error keeps popping up: ERROR 000539: Error running ...
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128 views

jagged edges in mosaic DEM

I encounter edge issues when trying to mosaic USGS NED DEMs in ArcGIS 10.0.0. After projection and aggregation, I attempt arcpy.MosaicToNewRaster_management(). I've reproduced the same results using ...
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207 views

How to rename .met file with model builder which uses an iterator to rename .sid files?

I have a model that iterates through a folder containing .sid raster datasets, amongst other types of rasters (so I'm using a *.sid wildcard). I note, however, that ArcCatalog/Model Builder/Rename ...
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366 views

Raster Over Layer in Leaflet from GeoServer

I want to add a raster over layer onto the base layer and the raster layer is published by a Geoserver WMS. I set the raster layer's geographic coordinate system as the same as the cloudmate tiles. ...
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282 views

Raster satellite images for QGIS

When I try to apply a downloaded GIS satellite (t=rimage to Quantum, it doesn't seem to open properly. There must be a step-by step description on how this would be done effectively. Can anyone tell ...
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220 views

Issues with building a VRT. from OS map tiles in QGIS

I am trying to speed up rendering of OS raster map tiles in QGIS. The tiles are 1:10k Tiffs - about 130 of them. When I attempt to build the VRT it says complete, then it shows up an error ...
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297 views

Error when trying to import a raster file into a geodatabase

I am using ArcGIS 9.3.1. For some time I have had no problem importing a raster file into my geodatabase. That's recently changed and I have absolutely no idea why. Every time I try to import a raster ...
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119 views

Raster display for topographic map

I'm trying to see how good a custom topographic map could be using only free data For the moment I'm just playing with the data so of course the colours are not pretty. I did some classification and ...
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74 views

Create 6 band IMG file with GDAL out of two JPG files, one with WorldFile coordinates

I have two JPG files 1 ortomap: http://imageshack.us/photo/my-images/703/ortofoto1.jpg/ with WorldFile: 0.683772574816354 0.000000000000000 0.000000000000000 -0.683739485024190 ...
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860 views

Raster grid for zonal statistics in R

I have two raster layer, the first one r is my zonal mask as a raster grid, and I created as: ext <-extent(Yraster) r <- raster(nrows=32,ncols=32,ext) r[] <-(1:ncell(r)) and project it ...
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Reclassify ESRI raster using variables from a SQL Server table (connecting with pyodbc)

I am trying to reclass a raster file (representing vegetation and land cover types) using values stored in a SQL Server Express table. I have a set of ~400 species records in the table, with each row ...
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Corrupted rasters after import into ArcGIS FGDB

I have been seeing a number of corrupted rasters recently after importing them into file geodatabases (FGDB). The image below left shows a .tif prior to the import, while the image to the right shows ...
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607 views

How to add ECW support to GDAL bundled with PostGIS Windows

I'm currently trying the new raster functionalities of PostGIS 2.0 and I successfully imported some GeoTIFF file into PostGIS (although it only find one band so it's all black and white for some ...
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91 views

Make a thumbnail of a raster in PostGIS

I'm fiddling around trying to create a thumbnail of a fairly large (originally 27MB) raster, chunked into 64x64 blocks. I've got the following and it works, quite well, but I'm wondering if there is a ...
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141 views

identify the fraction of raster cells and listing all the cell values in every polygon

In Arcgis 10 I have a netcdf file that maps the fractions of cropland in the world from 1700 to 2007. I extracted the years that i needed as raster layer format (continous data from 0 to 1) and now, ...
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827 views

ArcGIS 10 - disappearing rasters?

From time to time it happens to me that rasters disappear at certain zoom level in ArcMap, or only some parts of the raster (strips) show up. I'm working on WinXP, ArcGIS / ArcView 10, Sp2, rasters ...
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How to recreate the 'standard deviation' option for a raster layer in Mapserver?

In mapserver is there any way to recreate the 'standard deviation' option available in Arc's symbology for a stretched raster layer?
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Guide for esriRasterOpCode

I'm building dynamic cartographic symbols to display inside ArcMap, but they are displaying "wrong". Is there a guide somewhere that will show what raster op code does? I mean, not only show, but ...
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347 views

ValueError when reading a raster band as a numpy array

Here's the problem shown in Python shell: In [32]: from osgeo import gdal In [33]: geotiff = '/Users/calvin/work/luc/proj_public/media/GLO ...
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167 views

Can I overlay layers in Dealul Piscului 1970 and WGS84 in QGIS?

I have a 10 Gb ECW file (mosaic of a whole county) that is in Oblique Stereographic projection with Datum: Dealul Piscului 1970. The problem was that no matter the Default CRS for new project was, ...
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186 views

How to retrieve the value of a cell in RasterLite?

Just wanting to know the SQL statement needed to find out the pixel value for a location, when the raster is loaded into SpatialLite as a Raster? I loaded the Raster using rasterlite_load -d ...
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144 views

How to get SplineWithBarriers to work in C#

I have been having fits trying to get SplineWithBarriers to work but to no avail. My environment: Windows 7 64 bit Visual Studio 2010 Team Edition ArcMap Release Version 10.0 Product Version: ...
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207 views

vba code for algorithm to assign track file gps UTM coordinates (East Africa) to an overlay 5x5km grid cell

The GPS coordinates are temporarily imported in to an Access database from DNR Garmin files downloaded (as dbf file(s)), and then exported for mapping in AEJEE (ArcExplorer Education Edition). I need ...
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250 views

Assign Custom Band Combination To Image Catalogs In ArcGIS

I have an image catalog composed of 4 band rasters. I would like to use the same image catalog, and set custom renderers for a true color and false color combination and save each of those catalogs ...
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701 views

Conversion to Raster issue in ArcGIS 9.3.1

Trying to convert a polygon to raster in ArcGIS gives me an error... I am wondering if there is another way around to do this? I am using ArcGIS 9.3.1. The error i am getting is number 9999 when I ...
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347 views

16bit grayscale raster displays all black in Geoserver

I have a 16-bit raster (MrSID) that I want to display in Geoserver 2.0.2 but it is displaying as all black. If I create a new style similar to the default raster.sld but with graychannel element the ...
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727 views

two results of IDW in ArcMAP are different

i added the following points to ArcMAP using "Add XY Data". x,y,z 7,39,117 27,17,122 27,61,123 46,36,136 52,14,138 55,46,141 56,56,137 65,24,144 65,36,145 Changed raster output size in "options" ...
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NetCDF calculations

I have a raster of monthly average temperatures for the state of TX (represented as a grid) for a 50-yr period in the form of a netcdf file. I can display the temperatures but am not sure how to do ...
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10 views

load raster (geotiff files) to postgis with url

I tried to load rasters to postgis with raster2pgsql but this not satisfy my project because it uses local files. i have 5000 and will be more in future geotiff files in cloud host. is it possible ...
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12 views

Importing large tiled datasets (e.g. Ordnance Survey) into MapInfo?

I am currently using MapInfo and have several large Ordnance Survey datasets, which require updating. They are tiled .tiffs and need to first, be registered as .tab files. Second the .tab files need ...
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18 views

How to fill holes/missing values in XYZ data / a DEM with QGIS?

I have equidistant XYZ point (text) data that I used to create a point grid. However, it's not perfect - there are some holes. I then created a DSM raster from it, which obviously has the holes too. ...
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20 views

GDAL raster shifting with python error: 'NoneType' object has no attribute 'GetGeoTransform'

I'm trying to shift a georeferenced raster by 0.5m N and 0.5m W in QGIS using the python console: from osgeo import gdal # Open in read/write mode rast_src = gdal.Open('test_raster.tif', 1) # Get ...
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13 views

Creating a for.loop to randomly extract data from a raster stack within shapefile extents

I'm currently comparing a MODIS time series of about 15 years to determine the effects of pasture management practices on the "greeness" of pastures in a water catchment. So far I've been able to ...
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23 views

Computing Area Weighted Average on Rasters Using Raster to Polygon

I am using ArcGIS 10.3 for Desktop. I am trying to compute area weighted averages for polygons in a shapefile using values in a single band raster data set. The approach I am taking is that I am ...
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22 views

GDAL: defining nodata value for gdal_calc.py

This old post exactly describes my question: http://lists.osgeo.org/pipermail/gdal-dev/2011-September/030281.html I want to copy the numpy ma.masked_outside functionality to mask values in my ...
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6 views

Raster loading on arcgis javascript api on user request

In my project, i want to give the user the option to select the date of the raster he/she wants to display, then that raster would be loaded onto the basemap. I loaded daily raster (CREST hydrological ...
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23 views

How to process a big number of raster outputs?

I am new to python and QGIS. I'm trying to take some simple operations (e.g. count, average) over a big number of raster maps from a python script. I'm using the "r.series" algorithm (from processing) ...
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19 views

Different colors of rasters after loading back to QGIS

I am experiencing this issue longer time but sometimes it is really annoying so I would like to solve it. When I save an image from QGIS - no matter when using Project/Save as image or using Export ...
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24 views

Creating raster depicting landcover/use change in ArcMap?

How would I create a conversion matrix in ArcMap 10.2.2 to display the changes between two rasters (Land Use Land Cover Maps)? I have produced Land Use Cover Change maps from temporal satellite ...
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10 views

fit polynomial function on spectral data

I want to fit a polynomial function (max. 3rd order) on each raster cell over all my spectral bands (Landsat 1-7) creating a new raster(stack) representing the coefficients. I got my data (including ...
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26 views

Is it possible to put a raster layer on a shifted Chinese basemap using leaflet API?

Recently, we want to develop an application with leafleat and gaode basemap because some features of these products fullfill our basic needs. We want to overlay some raster layers caculated by spatial ...
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20 views

Is the QGIS connection with ArcGIS “mapserver” still working?

I would like to add the Ocean Basemap to QGIS. I also found the other posts and I followed this procedure: http://hub.qgis.org/wiki/quantum-gis/Arcgis_rest Hovewer when I put in the Python console ...
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26 views

How to merge two rasters when are on the same place

I have two rasters in GRASS GIS. first : raster of DMR, raster picture of relief - created from high values second : raster of buildings where pixels of every building have value of high of this ...
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Single WMS from single mapfile with several rasters in MapServer

I have several rasters in a single mapfile, I put them as layers like here: LAYER NAME "Layer 1" GROUP "All Layers" TYPE RASTER STATUS ON ...
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Extracting many raster values for statistical analysis in JMP

To summarize: We have 28.5 million XY coordinates we would like to compare up to 6 raster values for, and prefer to look at those values in JMP. We are exploring interpolation methods in ArcGIS for ...
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25 views

Converting lat,lon & solar data in CSV to raster using Python?

I have a csv file with lat,lon and solar radiation data. I am trying to convert it to a grid/raster format so that it can be used with a raster population data set that is in ascii format. How can ...
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24 views

What format are raster data files with data, db, overpict, vect, and WMS folders?

I have a type of GIS data but I don't know what is this type or how to open them. My data are formed by 5 folders: data, db, overpict, vect, and WMS. The main folder (I think) is the first one; it ...
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31 views

Georeference a computed tomography image without changing its proportions in QGIS

I have several images obtained from a Micro computed tomography (mCT). The scanned elements are human teeth. In a particular mCT slice, I have introduced a cartesian plot with its X and Y axis. The ...
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27 views

change from NAD 1983 to some PCS?

I want to ask how to change the coordinate system from NAD 1983 to some Projected coordinate system. I tried to change this DEM file to WGS 1984 (all of them) but when I did that my scale becomes 1:4. ...
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26 views

Raster loading in web application

I'm making a GIS web application. I want to give the user the option to choose the raster to display on the map on the basis of date. I have daily rasters of 3 years. I'm using ArcGIS Server. Any ...