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

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How to use ModelBuilder to run tool extract by mask on many rasters in ArcGIS for Desktop?

I'm trying to extract the same part of multiple rasters (Landsat scenes) using a polygon so I can do a time series. I've been trying to do it in ArcMap 10.2 ModelBuilder but the following error ...
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67 views

Why do I get “Insufficient memory for image” although there should be enough RAM?

QGIS reports "Insufficient memory for image 1403x716", when I want to load a raster. The problem begins after 1 hour of work. Had somebody had such problem? System win7 64 bit, 16GB RAM, Intel Core ...
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22 views

Repeatedly losing data sources for raster layers in ArcGIS for Desktop?

I have several raster layers that keep losing their data connection whenever I add a new layer from running a tool. I repaired the data source, but this keeps happening every time I run a tool. Is ...
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28 views

How to clip MrSID Files in R and export to GeoTiff?

I would like to use R to: Read in an MrSID raster (.sid format) Clip the extent using a shapefile Save the new clipped raster as a geotiff I am fine with steps #2 and 3, but I can't find any ...
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420 views

MapServer map file shows Raster image as white

I'm using PAN image for raster publishing but the output in browser shows a full white image? Please give me the solution? My map file is ass follows: MAP NAME "terra" # Map image size SIZE 600 600 ...
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1answer
166 views

IDW with QGIS from a vector points file within a mask

Given two inputs: A shapefile: points A raster: mask I want to interpolate the points within the extent of the raster except the NoData pixels that i want to use as a mask. NoData pixels are the ...
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2answers
122 views

Unstack band layers from raster

I have stacked layer (from ERDAS) of Landsat 1-5 and 7, bands. I want each of the bands in a separate layer. How can I do that?
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2answers
327 views

Issues calculating range with QGIS 2.0 raster calculator

I would like to calculate a simple range using the QGIS 2.0 Raster Calculator, but am getting strange results. I believe I am not using the correct syntax. To get all values between .003-.5, I ...
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103 views

How to remove las2dem streaks from raster DEM?

I've created a series of DEM files using the las2dem tool from LAStools; however since I don't have a licensed version they have black streaks running across them. Does anyone know a good method for ...
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53 views

Is there a tool to shrink/grow raster data edge by n pixels

Looking for an open source tool to grow/shrink raster edge by n pixels. I noticed Grass has r.grow but hoping there might be a way to do it with GDAL, PostGIS or python library. More information: I ...
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508 views

Raster in TOC to geotiff on disk in ArcPy?

I am really hoping that someone out there who knows a bit about ArcPy in ArcGIS10 can help me out. I am attempting to automate some work w/ netcdf files. Basically, I am able to automate the creation ...
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1k views

Finding outliers with wrong Z values in LIDAR data

I have more than 2000 XYZ (only ground points) .txt files and I have to do Quality Control (QC). Let's say I have file, which I converted to multipoint (or even singlepart feature). I have mean Z ...
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34 views

Creating a Grid For Raster When Measuring Land Cover In Accuracy Assessments

I am assessing the accuracy for the 2011 National Land Cover Map (NLCD). Each pixel for the NLCD measures 30m x 30m. For my reference data, I'm using two sources: 1) Google Earth (~20 m ...
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2answers
81 views

how to specify -t critical dowloading raster with raster2pgsql

I'm trying to download a raster into postgres/postgis. So far I wrote: raster2pgsql -s 3006 -I -C -M -R filename.tif -F -t 463.313x463.313 schema.rastername | psql -h localhost -U postgres -d db ...
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17 views

Zonal smoothing on a specified area of a raster?

Is there any way to smooth a specify an area on a raster, such as a DEM, and smooth it? For example, I'd like to smooth out the artifact highlighted in the red box. What is the best course of ...
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45 views

Distance to nearest cell with value “x”

I would like to create a raster where each cell equals the distance to the nearest cell >= the value of the source cell plus a constant. In the example below, the input raster has a grid size of 1m x ...
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26 views

Raster to TIN error

I have a big raster file (6,5gb) that I am trying to convert it to TIN format. What happens is that after 15-25 min of processing I get this error message Can someone tell me how can I fix this? ...
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18 views

How to save symbology for raster and also its associated 'value' (using unique values)?

I have a raster in ArcMap (built using sum function in cell statistics), and only want to show the water parts of it (band 128). In doing so I only need to show multiples of 128, however there are ...
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28 views

Percent coverage of a polygon in a raster grid

I have a wooded area polygon and a study area grid of cells with 300m resolution. I would like to calculate a raster which shows the amount of each grid cell covered by the polygon. The density per ...
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1answer
52 views

Loop over pixel data using Python in ArcMap

Further to my question on SO I'm trying to check the validity of bitmaps. Mainly for transparent or black pixels. I'm new to ArcMap, and I now know that Python scripts can be run from Arc. Any ...
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101 views

Raster style based on percentile QGIS

Is there a way to get similar raster styling in QGIS as ArcGIS does with classified raster data based on percentile scores? In other words, I want an equal number of pixels in one color for my entire ...
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2answers
262 views

How to display NoData of a raster in QGIS

How can I show raster pixels with NoData value in QGIS? In ArcMap there is a button to choose the color for the NoData value. Is there something like this in QGIS?
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43 views

QGIS georeference raster to world file (WLD)

I am trying to georeference a raster (jpg). I can easily create a geotiff, but when trying to use the QGIS georeferencer to create a wld file instead, something goes wrong. I have the target CRS set, ...
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2answers
33 views

TIF with TFW not opening and NO spatial reference

I will receive tif files with the associated tfw. I always thought that these would open correctly in Arc. When I check the spatial reference on the tif it states undefined. So I try to add it myself, ...
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559 views

Spectral profile (z-profile) viewer for ArcGIS

I have multilayer raster with 6 bands. Is there a way to select one specific pixel and to display the z profile (the values of each band) for this pixel as a chart or table? I am looking for a tool ...
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37 views

Reassigning raster values by looking for nearest pixel in another raster using QGIS?

I have two non-overlapping rasters, A (red hues) and B (blue hues). I want to change the value of pixels in B via a nearest-neighbor search in A; i.e. a pixel in B with a value of 15 looks for the ...
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35 views

Erode pixel areas in QGIS

I try to resize Pixel segments exported from eCognition. The goal is to erode the segments for one pixel of the boarder. So for example if the segment is 30px x 30px the result should be a new area ...
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21 views

Clipping raster Data: Converted from GeoPDF to .tff. to .lyr

Program: ArcGIS 10.3 Need: Trying to get a free basemap for georeferencing a historic map so that I can overlay it in my project area. Attempted to use ESRI's USGS National Basemap so that I could ...
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8answers
14k views

Creating shapefile showing footprints of Rasters?

I have around 1,000 satellite images in tiff format, and I want to create a shapefile which will serve as an index to the rasters. This is something similar to a raster catalog, but I do not want to ...
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1answer
75 views

aggregating using 'gdalwarp -average' resulting in incorrect values

I'm trying to aggregate data up from 0.05 to a coarser 0.25 resolution and am having trouble getting gdalwarp to work correctly. From comparing the original input data with the aggregated data and ...
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108 views

How to update raster pixel values based on another raster with conditions in QGIS?

I have 2 land cover rasters. I want to update parts of the first raster with values from the second using QGIS. The workflow should be like this: 1. Select values equal to 30 and 34 in the first ...
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39 views

How do you extract the mean fire frequency (raster) for each point within a given buffer size using R?

I am trying to extract fire data (mean and max fire frequency) for each point within a given buffer size (250m) around multiple points. Currently, my point data is in Lat and Long. For the raster ...
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75 views

Raster calculator: Insufficient memory available for operation

I use QGIS 2.14 (Windows, 64bit) and try to do some raster calculations with EUNIS habitat data, filter for specific habitat types, files are about 3 GB. RAM: 8 GB (7,85 GB usable) Virtual RAM: 8043 ...
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17 views

Dynamic style for DSM layers in geoserver

I have lots of raster layers to show DSM under GeoServer 2.8.2. The input file is the one band TIF served with ImagePyramid plugin. Could I set a dynamic style which related with min and max values ...
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34 views

NDVI polygon from NDVI raster

I am currently working with NDVI data. I found this format which seems to be preferred by our clients: Our maps are made in ArcGIS, I've tried running classification but classes won't allow me to ...
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2answers
24 views

Intersect with Raster data

I have ArcGIS 10.2.2 I have raster data over a whole state but am looking at just analyzing a specific county. I downloaded county polygons to overlay over the raster data to determine the area I ...
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1answer
99 views

Identifying value of closest non-NA pixel

I have a raster representing a large landscape, where pixel values indicate particular land classes. I have been using the "distance" function in Package 'raster' in R to calculate the distance from ...
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1answer
11 views

I got the tiles of a raster and I would like to create the original raster

I got the tiles of a map named txt 2x0x0.png 2x0x1.png ... 2x1x1.png 2x1x2.png ... 2x45x1.png 2x45x2.png The first part is the zoom, the second the row and the las the column number. Is it ...
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41 views

Edit script to use in ArcGIS-R-Bridge

I have an interpolation script running in R which I now want to implement into ArcGIS so I can use it independently with any shapefile. To get to a result I scripted in 3 steps: Original R script: ...
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36 views

QGIS tiff image loaded but not visible

In QGIS I used the Georeferencer on a jpg image I had prepared in Gimp. But when I load the resulting tiff image into my QGIS project it is invisible, even though an image viewing program can show it ...
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23 views

Probabilities matrices and cellular automata in IDRISI

I apologize for asking about such elementary things, but I am utterly new to IDRISI yet am now having to learn how to perform certain tasks with it on very short notice. Am I right that, when Markov ...
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1answer
378 views

Incorrect spatial extent for imported HDF image on ArcGIS Desktop?

I imported an hdf image onto ArcGIS but I cannot make correct projection of it. Also, it does not have correct spatial extent (please see the enclosed figure, the small one is projected under WGS84). ...
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1answer
46 views

Downloading GIS Map for Pakistan into QGIS

I'm looking to add canals and bunds to my raster and have found some GIS maps at: Canals Bunds Bunds Image Network Plan Map Image - looks to contain both canals and bunds I'm not clear on how to ...
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2answers
46 views

Copy resolution extent CRS metadata from one raster file to another using raster R

I have two geotiff raster files, one has all the metadata information and in the other the information was lost. I know that all the metadata information was exactly the same so I want to copy it from ...
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1answer
25 views

Mouse-over raster surface to stream values to text file ArcGIS

This is a weird one. I have a user who wants to add a statistical surface to ArcMap and then mouse-over the raster surface and stream those values (z) to a text file. MouseTips can show underlying ...
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310 views

Plotting Smith and Sandwell global seafloor topography grids in ArcGIS Desktop?

Does anybody have any experience with plotting Smith & Sandwell 2-minute Mercator-projected grids in ArcGIS? I've downloaded one in two formats: ers and img. I've found tools for processing .img ...
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2answers
44 views

PostGIS: MultipolygonZ to floating point raster

I am trying to convert a table of MultipolygonZ geometries to a floating point raster where the pixel values of the output raster will be derived from the Z values of the MultipolygonZ geometries. The ...
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1answer
472 views

converting vectors to raster (burning streams)

I converted my stream vector to a raster file (using polyline to raster conversion tool). I anticipated that I would get a No Data row in the raster file attribute table, so that I could use a ...
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1answer
144 views

Clip GAPAnalysis and save as a new file output strange looking colors

I download USGS GAP Analysis and use a polygon to clip raster from that GAP Analysis. I am wondering why there is a strange looking color when you clipped the raster. If you zoom in, you can see ...
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1answer
258 views

Creating DEM from cross sections in ArcMap?

I have a DEM in arcmap and cross section of a river which flows on the Dem in Hecras. I now the cross sections are more accurate. I want to make a DEM from some of my cross sections and stitch it on ...