Rasters are regular grids of values, usually stored in an image-like format.
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126 views
Are there any examples of WCS getcoverage requests done using ajax?
I am looking through openlayers to try to figure out a consistent format for generating views of coverages that can satisfy any wcs server, but mainly I'd like to get geoserver coverages.
While I've ...
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25 views
How to Convert Multiple Raster in to NettCDF in Arcmap 10.1?
My name is Paresh Chaudhary and I've worked in the field of Geometics since 2008. I have 30 day by day surface temperature images of MODIS, aqua satellite. Now i want to convert it into a NetCDF ...
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33 views
How can I create a multi layer exportable file (.xcf .psd) from multiple raster image in QGIS?
I have many raster file of the same zone but in differents spectral bands. I would like to create an exportable file of a small portion that can handle different layers. So in practice I would like to ...
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79 views
Are there limitations with gdal virtual raster option?
I am new at Postgis and I'm groping...
I pretend to rasterize some weighty vector layers in Postgis, do some map algebra and reclassification with them and visualize intermediate as well as final ...
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52 views
How I can incorporate results of histogram stretching into georeferenced image?
I have one channel 8 bit raster and when I open it in QGIS with histogram stretching "on the fly" it looks fine. How I can recalculate original raster accordingly changed histogram?
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103 views
How to use GDAL to burn a selected value from one raster into another?
I think this should be a relatively simple process, but I'm not quite sure how to approach it.
I have a shapefile containing 1000's of polygons. I also have 19 rasters. All of the polygons fall ...
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0answers
132 views
Importing grib, grib2, netcdf to PostGIS
According to grib2 to raster? (grib2 -> raster2pgsql -> PostGIS 2.0 -> GeoServer), it seems like that grib2 can be treated as raster directly. Is it the so called "standard" way?
How about ...
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148 views
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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26 views
When a raster is described in general as either a double or an integer how do conversions work for that type
I know a raster format is essentially a grid of cell values that may have values associated with color, but I'm unsure of how the primitive types factor into the format. In addition if I need to write ...
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51 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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0answers
81 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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138 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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124 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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69 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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49 views
blank preview image for ImageMosaicJDBC (postgis raster) layer
In geoserver, while publishing ImageMosaicJDBC layer seems no problem, the preview of this layer does not give me an meaningful overview image, only a blank image with the correct lat lon extend. Also ...
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93 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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58 views
footprint polygon from raster data with postgis
how can I create a polygon, containing the actual outlines (aka footprint) of a raster file with postgis?
I just need the outlines of the data containing parts of the raster.
ST_PixelAsPolygon ...
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74 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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0answers
55 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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293 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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135 views
Can hdf4 images be used in QGIS?
I'm trying to use hdf4 raster image in QGis 1.8. This image come from the Modis satellite. I've loaded the file, it appears on the layer window bu it is impossible to see it on the display window.
...
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116 views
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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68 views
3d arcgis raster .tiff image to CFD software
i am trying to export 3d raster image prepared in arcgis to cfd package such as Fluent. I was wondering if any one has experience to convert raster image to autocad 3d format, stl, vrml or any other ...
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0answers
53 views
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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56 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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99 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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193 views
how to buffer a raster cell using Visual Basic ArcObjects in ArcMap
I am new in visual basic, I have a question about creating a buffer zone based on a raster layer.
I have a raster layer named "Value_Raster", I have a textbox in the userform, I also create a tool ...
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0answers
151 views
How can I ignore NoData values in map algebra?
I need a way to exclude NoData from calculations. I don't want any NoData cells from any of the rasters to be used in pick or con statements.
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0answers
42 views
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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47 views
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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153 views
ArcObjects .NET 9.3 upgrade to 10 breaks IRasterDataset.Copy(…) code
I have to upgrade an application from ArcObjects 9.3 (C# .NET) to 10. Unfortunately, there seems to be some incompatibility regarding the IRasterDataset.Copy method. The following code worked fine in ...
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0answers
218 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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0answers
133 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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104 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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0answers
107 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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0answers
151 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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0answers
172 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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0answers
510 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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0answers
255 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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0answers
551 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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0answers
15 views
What's regular blocking arrangement ? (GDAL)
I am using GDAL tools to retrieve PostGiS raster. The code(command line) I am using is as follows :
gdal_translate -of AAIGrid "PG:host=localhost dbname='database' user='postgres' password='admin' ...
0
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0answers
14 views
How to convert Rotated Polar grid raster to Non Rotated Polar Raster?
I have a RCM data which is in rotated Polar system , I want it to convert into non-rotated polar RCM. How can i do this things ? Please give some guidance
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0answers
20 views
ArcMap 10.1 - Tabulate Area tool “doubling up” for Overlapping Buffer Zones
This question is related to a previous question I asked: Raster Version of Spatial Join (one to many)
I used the Tabulate Area tool to crosstabulate values between an overlapping "buffrast" raster ...
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0answers
11 views
MapServer 6.0.2 pmapper 4.3.0 config_default.xml display group of raster layers
I'm aware the CONNECTIONTYPE UNION allows grouping of vector layers but not rasters. I've got several raster tiffs and want to allow the user to select checkboxes based upon the YYYY-MM-DD and only ...
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0answers
34 views
polygon/raster intersection artifacts
I'm intesecting a polygon with a raster using PostGIS > 2.0. The outer boundary of the polygon is formed by the convex hull of polygons (building outlines plus safety margin) and the inner rings are ...
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0answers
19 views
Loading raster from PostGIS DB into QGIS: succeeded yesterday, fails now
I have a PostgreSQL(v.9.2)/Postgis(v.2.0.3) database which includes raster layers (added through raster2pgsql).
To open them in QGIS (v.1.8.0-Lisboa), the "Add Postgis layer" menu will not work; ...
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0answers
34 views
How can i calculate the width of the dam?
I am working with Reservoir design. Now I am facing problem to calculate the width of the dam. I need to calculate the width based on DEM and height of dam at various points using Python. I am working ...
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0answers
28 views
GDAL: add metadata to Bands when creating new GeoTIFF
This is a metadata question :-).
I am processing airborne laser scanning full-waveform data to extract information and I store this information by creating a multiband GeoTIFF using GDAL. I will have ...
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0answers
27 views
Sum all cells in raster using javascript
I'm creating an agent-based model in Agent Analyst for ArcGIS and I need to sum all the values in a raster that has about 7 million pixels. I'm a very beginner in programming, and have a script that ...
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0answers
18 views
GDAL Utilties - Multiple Bands with Different Output Types
I have a raster dataset with 5 bands. 4 of the bands are 8bit unsigned and the 5th band is 32bit floating point. I need to clip the dataset into tiles using GDAL (I'm using gdalwarp with a cutline ...
