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

learn more… | top users | synonyms (1)

0
votes
0answers
45 views

Android app where i can import image and set waypoints by GPS

Hello i'm looking for an application for android where I can upload a large image raster and apply for it `these GPS waypoints. We would like to count the trees in the area, we have the exact raster ...
0
votes
0answers
27 views

How can I add Raster Map as permanent layer òr Level to Microstation .DGN file

Hei Am having Raster Map and would like to visualize permanently whenever the DGN Opens , I dont wish to attach them as reference in Raster Manager but rather save it as one of the Level in ...
0
votes
0answers
93 views

Create Image Mosaic JDBC datastore in command line

I would like to publish raster from PostGIS database, and I found this tutorial http://docs.geoserver.org/2.1.4/user/tutorials/imagemosaic-jdbc/imagemosaic-jdbc_tutorial.html , everything works fine, ...
0
votes
0answers
73 views

Turn vector layer in raster layer based on cost

Hy, I am trying to rasterize some vector layers into raster layers and I know this is possible with QGIS by using the rasterize function in the raster menu but I don't know how to do the following ...
0
votes
0answers
227 views

How to convert a shapefile to binary grid?

I have a polygon shapefile with a UTM projection which I read into MATLAB: s = 'C:\path\to\shapefile.shp' % Read the shapefile shp = shaperead(s); How can I convert this simply polygon into a ...
0
votes
0answers
55 views

IDW Interpolation Raster clipping

I used the CLIPPER tool under the 'Raster' menu to clip my interpolation raster with a polygon. the resulting output is not displaying anything even though the process completes without any errors. ...
0
votes
0answers
26 views

What information, Open Attribute table of stream segment shows?

I have delineated the watershed from DEM data. I have converted the stream segment(raster) to vector lines. In the attribute table of this vector lines, there are 3 columns, CAT, VALUE, LABEL, what ...
0
votes
0answers
49 views

How do I select specific colors within a raster to create polygons with in QGIS or ArcMap?

We have a few georeferenced zoning map rasters and would like to convert specific zones (colors) to polygons, sometimes multiple zones as different polygons. Our workflow has been in the past to ...
0
votes
0answers
66 views

Why does heatmap size vary with number of points

I am making three heatmaps based on points over the same area and don’t understand why the number of rows and columns would vary depending on the number of features. The first feature set has 398 ...
0
votes
0answers
17 views

Raster images at edge of data frame not displaying. How can I prevent then from disapearing?

I have a series of satellite images and as I pan or zoom, the images near the edges of the data frame the stop being displayed leaving small areas with no imagery. It is seems to occur when only ...
0
votes
0answers
51 views

Zonal statistics won't work after re-projecting vector layer

I have qgis 2.0. I want to analyze raster information within a buffer of 30 miles around a vector layer of cities across the world. However, both the raster and the vector are in WGS84. I have no ...
0
votes
0answers
68 views

Dates are off when opening netcdf file in R

I have a netcdf file with the time dimension that goes from 12/2007 until 12/2010 with monthly time steps. I can see the correct dates in both arcgis and panoply. Panoply tells me this file is a ...
0
votes
0answers
18 views

How to obtain stream segments from complemented image(raster data)?

I have raster data in tiff format, i want to extract stream segments from the complement of original raster data. I am able to extract stream segments from original raster data, but not able to ...
0
votes
0answers
66 views

Update a NetCDF file using GDAL

I have to edit a NetCDF file using GDAL in C++ code. When I try to update a subset I have this error message: ERROR 6: The NETCDF driver does not support update access to existing datasets. How can ...
0
votes
0answers
25 views

buffer of clusters in a sparse matrix

I work with MATLAB. I have a sparse matrix where I identified different clusters. The value within each cluster is equal, while each cluster has its own unique value. I have 0s as background (outside ...
0
votes
0answers
119 views

Choose what zoomlevel to read from for mbtiles file in GDAL

GDAL is supposed to read MBTiles files and to do so, it selects the highest zoomlevel available. However, is there a way to choose another zoomlevel? i.e. override the default and go for a lower one? ...
0
votes
0answers
75 views

How to split a raster into multiple rasters using QGIS?

I would like to know how to split a raster into multiple rasters in a single operation using QGIS. Although I can clip the raster image, it would be better to split it using a single operation. I am ...
0
votes
0answers
105 views

recording pixel value with Python script in ArcGIS 10.x

A scripting newbie question... I'd like to write a Python script for ArcGIS 10.x that would record the pixel value for all pixels in a raster. Furthermore, I'd like to only record a given value once ...
0
votes
0answers
43 views

recording pixel value with Python script in ArcGIS 10.x

A scripting newbie question... I'd like to write a Python script for ArcGIS 10.x that would record the pixel value for all pixels in a raster. Furthermore, I'd like to only record a given value once ...
0
votes
0answers
233 views

gdal python set projection of a raster - does not work

Gdal 1.9.2, ECW driver: ECW/ERDAS Compressed Wavelets (SDK 3.x) I am having problems with the script that supposed to set projection of the ECW to EPSG:27700, i.e. the British_National_Grid. Please ...
0
votes
0answers
129 views

Geoserver raster (in geotiff format) becomes black when grouped by other layers in vector format?

Good day, I am a newbie in field of GIS systems. Currently I have an issue when grouping layers, raster and vector. I would like to use satellite image in geotiff format as a base layer. It works ...
0
votes
0answers
36 views

TIF file creation from shapefile in GRASS?

Does anyone have any idea how to get around this problem? I've been looking for a solution to no avail. I'm trying to convert a shp file to a grid, and the tif is hanging up. Output raster layer: ...
0
votes
0answers
18 views

How to iterate the area of uniqueValue in raster?

Here is a figure shows the result of the classify after using "IMultivariateOp.MLClassify",but how can I iterate them? Can I iterate them directory instead of using IRasterWorkspace or ...
0
votes
0answers
91 views

Strange black pixel on edge when generating with gdaldem -hillshade

I'm getting a strange result when I'm generating an hillshade with the gdaldem hillshade command. Here is my command (see the compute_edges parameter): ...
0
votes
0answers
54 views

How can I add/define a legend for RGB images in QGIS?

I have a RGB image in QGIS that is the product of some raster analysis (e.g. QGIS's relief operation, results from sound/traffic models) to which I want to add a legend. I'd like to denote several RGB ...
0
votes
0answers
432 views

ModelBuilder: iterate raster output as input for raster calculator?

I remove values (above 249 and below 49) from raster files (called Name in the example) with the raster calculator. I do this by passing the following condition to the raster calculator: Con("%Name%" ...
0
votes
0answers
56 views

Geoserver WMS request raster clipped with field boundary

I have recently set up GeoServer instance and uploaded raster data and a set of field boundaries. I would like to be able to select a field boundary and have the server return the portion of the ...
0
votes
0answers
164 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 ...
0
votes
0answers
149 views

Why does Make NetCDF Raster Layer tool give Error 000276?

I am trying to view NetCDF files created into WRF into ArcMap 10.2. I used the 'Make NetCDF Raster Layer' Tool as described on the user-guide however, I keep getting the same error: 000276. Would any ...
0
votes
0answers
85 views

change unit while outputting raster to ascii

I am having a problem with outputting ascii from raster file. I've reprojected and set map unit to meter in ArcMap. I've also set the output environment-ish parameters like output projection, x-y ...
0
votes
0answers
22 views

Abnormal DEM values after fill operation

With arcmap 10.1. after filling the DEM the value range is -70 to 1078, but it should be between 225 to 1200. Can anyone suggest me a methodology or the necessary steps in arcgis 10.1 to mend my ...
0
votes
0answers
89 views

GRASS v.to.rast.attr returning null values

I am having a problem converting vectors to rasters in QGIS. As there is no tool where you can directly set the pixel size (instead of the height and width of the new file) in QGIS 1.8 (the version I ...
0
votes
0answers
31 views

Warping Rasters in QGIS

There seems to be a bug warping rasters in the new QGIS version 2.0 When you have to option of target and Source SRS, the Coordinate reference system does not get automatically writen into the box ...
0
votes
0answers
29 views

calculate proportion of polygon greater then 40 degrees in grid cell QGIS

I would like to calculate the proportion of greater then 40 degree slope within my polygon grid cells. I have a Slope Raster layer for my given area and have a polygon that overlays this raster ...
0
votes
0answers
25 views

Creating clumps of cells in a raster from seeds of 1 cell (in ArcGIS)

I need a process similar to that described in JPD's question: Creating randomly shaped clumps of cells in a raster from seeds of 1 cell/pixel? I have a raster with semi-randomly dispersed "seed" cells ...
0
votes
0answers
199 views

How to convert Raster to points in MapInfo?

I wanted to convert Raster data to point data in MapInfo.Does there any tool to convert? can anyone help me?
0
votes
0answers
69 views

Interpolation Technique

We have following solar metro logy parameter through satellite data with resolution of 100 Km^2 (10Kmx10Km) Insolation on horizontal surface Diffuse radiation on horizontal surface ...
0
votes
0answers
130 views

Problem with merging 15 DEM files in ArcGIS

I have 15 DEM files downloaded from USGS website. The pixel depth of each file is 32 bit floating, generic with format FLT. I'm then using data Management Tools > Raster dataset > Mosaics to new ...
0
votes
0answers
308 views

Tabulate area - Spatial Analyse

I am trying to calculate the amount (sqm) of land cover types (forest, water ect.) in 1045 buffer zones, all the same size (500m in diameter).. The buffer zones are polygons and the land cover is a ...
0
votes
0answers
185 views

Trying to build pyramids for large raster

I finally was able to make a slope with a rather large 5m DEM. But now I it usually wont finish drawing. When ArcMap asks to 'build pyramids' it always freezes sometimes instantly after accepting ...
0
votes
0answers
150 views

QGIS 2.0 cannot open TIFF

I've just installed QGIS 2.0 on my Windows 7 computer. I'm trying to open a raster and the system reports this message: Cannot open TIFF file due to missing codec. How can I solve it? Thanks in ...
0
votes
0answers
126 views

How to create a raster dataset from a known decimal extent?

I have an input raster pInputRaster. I want to create a new raster dataset called pOutputRasterDS that is the same width, height and cellsize as my input raster dataset (I'm not worried about ...
0
votes
0answers
40 views

How to select raster layers for averaging based on values in another layer?

I wonder if anyone have some ideas about how to solve this geoprocessing situation: 1: I have a raster layer called mixlyr_apr (representing depth values) 2: I have a series of raster layers called: ...
0
votes
0answers
76 views

Vector/Raster Intersection - Speedup and replacement for ST_Centroid

I have some raster data which is the altitude above sea level and also some vector data which represents building outlines. What I want to do is grab some buildings outlines and fetch all the raster ...
0
votes
0answers
78 views

QGIS merge rasters error

I've been trying to merge some raster tiles at work and I've been getting an error message saying I don't have the correct permissions. This works fine on my home pc. Any obvious reasons for this? ...
0
votes
0answers
172 views

How to create a raster mosaic from many asc files

I am trying to create a raster mosaic (in ArcGIS 10.1) as I am working with many asc files - I am trying to put all the different tiles together in order to run a view shed analysis. I have been told ...
0
votes
0answers
146 views

Assign spatial reference for 1000 different ECW raster datasets using 1000 different *.prj files through python programming or .net

I am having 2000 ECW raster datasets without spatial reference and also I have 2000 *.prj files in another folder. I know only the way as right click on raster datasets-->properties-->Spatial ...
0
votes
0answers
90 views

Floating Point UniqueValueRenderer

I am trying to build a unique value renderer using ArcObjects .NET. All the samples that I have seen use the attribute table to build the UniqueValueRenderer. However, my raster does not have an ...
0
votes
0answers
58 views

How to deal with the situation when two rasters stacked together in arcgis?

I am doing a project about petroleum geology. There are several formations needed to add attributes (e.g. name, thickness and age). I have the raster data of thickness, so I created a raster catalog ...
0
votes
0answers
95 views

Copy Raster Tool and 1bit to 8bit

I have a bunch of 1 bit rasters (700+) of scanned maps that I need to convert to 8-bit rasters. It's the only way Geosoft will recognize the spatial coordinates of the TIF as they don't deal in 1bit ...