1
vote
0answers
19 views

How to calculate average raster values around a set of points (ArcGIS or R) [duplicate]

I have a 30-m elevation raster as well as a set of points that overlay the raster. For each point, I want to calculate the average elevation within a 5-km radius of the point. One way I was ...
1
vote
1answer
55 views

How to display raster attributes by default?

I have a 4-bit thematic raster image with a color map from white to dark blue (Figure 1). The values 1 - 6 represent tree canopy cover at various breakpoints. I also created a raster attribute table ...
3
votes
1answer
170 views

ArcGIS Raster Mosaic Dataset and GDAL VRT, when to use?

ArcGIS has a the Raster Mosaic Dataset, QGIS and friends have Virtual Raster Tables. A skim of the documentation reveals much similarity. They both create or enable an alternate representation of ...
3
votes
2answers
391 views

Overlay Vector Layer on Raster Layer

How can I overlay a Vector Layer on a Raster Layer and assign NoData Values on the Raster where the Vector Layer does not cover the Raster Layer? (preferable with ArcGIS)
1
vote
1answer
224 views

How to convert a shapefile polygon to raster in C#

Does anybody know a way to convert a polygon (vector) in a shapefile to raster data WITHOUT using ArcGIS Explorer Desktop? Is there a way to do this 'progmatically' in C# (WPF with ArcGIS runtime ...
0
votes
2answers
199 views

Make a “Shaded Area Polygon” from HILLSHADE raster in ArcInfo 9.3

How am I suppose to extract the values ( Value<=100 ) from this HILLSHADE raster, and then make the extracted values as a VECTOR POLYGON (shapefile) ---I'm using ArcGIS 9.3 (ArcInfo with all ...
3
votes
1answer
158 views

Polygon to Raster is taking longer in script than in arcmap

I have a large dataset that I am working with. Basically I have a table with 900,000 records that I join to a geodatabase feature layer, then convert that to a raster. This process takes a total of ...
0
votes
1answer
144 views

ArcGIS 10 rasters/features in ArcGIS 9.3

I am tempted to go back to ArcGIS 9.3 from ArcGIS 10. For what I do, 9.3 is more efficent. Now...I know I cannot open ArcGIS 10 documents (maps, scenes) and layers in 9.3 unless saved as 9.3 file, ...
4
votes
3answers
453 views

Finding outliers with wrong Z values in LIDAR data

I have more than 2000 XYZ .txt files and I have to do QC: let's say I have file, which I converted to multipoint (or even singlepart feature). I have mean Z value for a file, but ... if most of the ...
2
votes
2answers
372 views

Calculate Percent coverage using another raster, with dif resolution and orientation

I have a 0.5 meter raster that defines presence or absence (cells are either 1 or 0). I have another 5 meter raster, which I created. I would like to calculate a percent coverage of the underlying 0.5 ...
1
vote
1answer
122 views

Scanned Transparent Map Overlay

We have a flat file of 50 Geology maps that have a transparent overlay with faults and drill holes. I have them scanned and georeferenced as TIF images and they will be used in ArcGIS 10.0, 10.1 and ...
3
votes
2answers
559 views

Majority filter (minimum mapping unit) in ArcGIS with larger window size

I want to run the majority filter in ArcGIS with a window size of 4 or 5 i.e. greater than the default 3. Is it possible? Or some other command (or tool) which might help me achieve that? thanks!
2
votes
4answers
1k views

ArcInfo Grid ASCII to ESRI Shapefile conversion

I have an ArcGIS grid ascii file (Ramankutty Cropland at 5 minute resolution) that begins as follows: ncols 4320 nrows 2160 xllcorner -180 yllcorner -90 cellsize ...
1
vote
2answers
284 views

ArcPad Raster Not Displaying Correctly

I have a hillshade that I would like to use as a background in an ArcPad 10 map. I get everything set how I want in in ArcMap and when I export the map to use on my Trimble the hillshade doesn't show ...
4
votes
3answers
124 views

Where can I find decadal climate and ocean data for Europe?

I would like to find decadal climate and ocean data for Europe that I can download and use directly in ArcGIS. Specifically, I am looking for mean annual temperature, sea surface temperature, and ...
2
votes
2answers
2k views

How to georereference a TIFF file which has already a spatial reference?

I have a TIFF file of Poland and a self drawn vector map of Poland. The vector map has no spatial information. I am intending to reference the TIFF exactly to the shape of the self drawn map. My ...
6
votes
1answer
169 views

How to reclassify raster data by their sign?

I want to do the following: I have two data raster sets with different units and values. One results from measured metric data, the other from modelled grid values. What I want to compare is simply ...
7
votes
2answers
394 views

How to create a solar intensity map for a garden plot?

I'm interested in creating a raster surface that depicts the average solar intensity per unit area for a small garden plot. I imagine the inputs into the model would be the following: Plot ...
2
votes
1answer
348 views

Question about sizes of input rasters for raster calculation

To calculate any formula (conditional statements/relational operation etc) in the raster calculator in ArcGIS using two different sources of raster images, I'd like to know input rasters must be the ...
4
votes
3answers
1k views

Reproduce raster with the same extent, and the same number of columns and rows

I have two raster A and B. A and B have the same grid size but different extent. How can I make A has the same number of columns and rows, as well as the spatial extent of B?
5
votes
1answer
269 views

Simplifying polygons made from binary rasters

I'm using MaxEnt to produce a species presence / absence raster layer. It works fine but I have to choose a cut off point for what constitutes presence or absence. As a result I end up with a lot of ...
2
votes
1answer
675 views

How to Calculate Utilization Distribution Overlap Index (UDOI) in ArcGIS 10?

I was wondering if any of you happen to have any information on how to calculate the Utilization Distribution Overlap Index (UDOI) in ArcGIS 10? If I understand it correctly the UDOI takes two kernel ...
6
votes
1answer
208 views

Raster aggregation in ArcGIS

I'd like to aggregate a raster from 1m to 6m in ArcGIS with a custom rule. For example, each cell value of aggregated raster = mean value of 5 highest cell values from 36 aggregated values. How do I ...
2
votes
1answer
414 views

How do I pass each parsed file name to the next tool in Model Builder?

I cannot get the Parse Path tool to pass each file name to the next tool. In the example shown, the Raster to Ascii tool will take the first entry in the 'filename' variable list as part of the output ...
3
votes
1answer
542 views

How to align two rasters of exact same cell size, extent in ArcGIS 10?

I have two raster datasets. One is already georeferenced. The second one is not georeferenced but should have the exact same extent and cell size as the first one. It is supposed to exactly overlap ...
4
votes
1answer
234 views

How to extract most probable flow line from multiple lines?

I have to apply uncertainty principle to computing flow accumulation using Monte Carlo method. I generate raster with random numbers which represents mistakes in creating DEM. Then I apply those ...
0
votes
1answer
616 views

Problem with raster calculator [closed]

When working with raster calculator there is an error 000539? The program failed to create a common raster map. I don't know what to do. I did the same in school without any problems. But now, on my ...
3
votes
1answer
628 views

GeoTiff convert to PNG with transparency

I need to convert a GeoTIFF image to PNG format with "NoData" pixels in the original image being transparent in the output. Is there any tool particularly in ArcGIS ArcToolbox or GDAL for this ...
7
votes
2answers
254 views

How to remove long linear strips from polygons?

I have a polygon layer representing impervious land cover. This was taken from a land cover raster dataset. The impervious data represents all impervious surface that is not buildings or roads. I ...
10
votes
3answers
9k views

Extract Raster Value into Polygon Attribute

I have Raster Data for a State which has Elevation Data in its pixels. I also have Vector layer which has the 300 divisions of State. what I need is, I want to get the average elevation value of ...
5
votes
2answers
334 views

In ArcGIS 9.3, how do I eliminate the slivers of missing data between polygons?

I am editing a single-band .tiff file in ArcGIS 9.3. I started with an image that I had to georeference, but unfortunately, the image had these little slivers of missing data between the data cells. ...
5
votes
1answer
587 views

Can QGIS handle .adf attribute data?

I have been using QGIS for about 4 months now and its been great to learn a new package. I have been trying to open a source raster (*.adf) files in QGIS. I can display the raster set itself, ...
3
votes
2answers
263 views

How should I get a Raster out of ArcMap and into Google Earth (.kmz) with transparency

RasterLayerExportClass will only create a .png with a single value transparency, however there is a bug in Google earth which prevents this from working. The other export options don't support ...
3
votes
2answers
943 views

Why is Raster Layer not visible?

I have a raster dataset that is not visible in Data View, but it is listed in the Table of Contents. I have tried viewing it in ArcCatalog but it is not visible there either. Is there something I ...
7
votes
2answers
306 views

Using ArcGIS to filter cells where 7 or 8 of the neighbors are different

I have land cover data that I would like to clean using some generalization tools. Majority filter does almost exactly what I want, but is missing one key option. Majority filter allows you to change ...
5
votes
1answer
820 views

How to keep spatial reference using arcpy.RasterToNumPyArray?

I am using ArcGIS 10.1, and want to create a new raster based on two preexisting rasters. The RasterToNumPyArray has a good example which I want to adapt. import arcpy import numpy myArray = ...
2
votes
1answer
97 views

how do I select more than one features from raster attribute table

for ex: "lc_2001" = 21, 22, 23, 24 AND "lc_2006" = 11, 31, 41, 51
3
votes
1answer
150 views

Probability distribution from list of rasters

I have 100s (exactly 224) of wind distribution rasters. I want to create a probability distribution raster of wind speed using all these rasters, so we can predict the possible wind speed in any ...
5
votes
3answers
823 views

How to display row and column indexes for an image in ArcGIS?

I have been struggling with how to find the row number and column number for particular points in any raster map. My raster details: columns and rows: 720 360 cell size (0.5, 0.5) How can I ...
2
votes
1answer
127 views

How to rename rasters in directory based on field value of their centroid feature class in ArcGis?

I have a lot of rasters named like r001.tif, r002.tif and so on. There is a point shapefile with centroids of these rasters and their real name in the attribute table. I'm looking for a way or some ...
4
votes
2answers
381 views

focal statistics with variable radius

is there an easy way to do focal statistics on a raster, with a variable radius for the neighbourhood to be searched? As in: that search radius would be stored in another raster? i tried something ...
5
votes
6answers
3k views

How can I align two non-coincident equi-resolution raster grids?

I have two rasters: a digital elevation model (DEM) and a Landsat band. The grid resolution of both is 30 m, but the grids are not coincident (see image: the dark raster on top is the DEM; the light ...
7
votes
1answer
383 views

Reduce extent of raster processing

I need to reduce the processing extent of my raster by some sort of automatic procedure in python. Currently the borders of the dataset I've been using has anomalies (due to the classification of the ...
6
votes
2answers
419 views

How to simply label raster cells?

I think the title says everything but: I want to generate a small sample raster (eg. euclidean distance or cost distance) to explain the method of cost-distance analysis, and I'd like to label the ...
2
votes
2answers
855 views

query raster in ArcGIS 10

I am using ArcGIS 10 (includes spatial and geostatistical analyst). I have a raster (GRID) with a value range of -167 to 18. I would like to query the raster and create a new one with only the values ...
0
votes
2answers
278 views

Set Raster Cells Based on NoData from other Raster

I have just no clue on this problem. I want one raster to set its values to 0 or NoData based upon another raster noData or 0 values. It's like a reclassify, but between two different raster's. I have ...
6
votes
3answers
1k views

How can I select vector features that overlay raster in arcpy?

I have two datasets: point feature class and raster (stored in file geodatabase). The spatial extent of the raster is smaller than the point dataset. Is there a way I could select (or create new, ...
4
votes
1answer
896 views

How do you add a long list of rasters together in Python?

If you have produced a long list of rasters (lets say 50) and want to add them together, is there any shorter way to write in python rather than typing all the inputs, like so: outRas = inRas1 + ...
2
votes
2answers
612 views

Python problem in conditional combining of multiple rasters and produce one output

I have two rasters for same spatial extent and need to compare both rasters cell by cell and produce one output raster. Each has 10 land cover classes. Based on those 10 classes the comparison should ...
2
votes
1answer
1k views

Creating a raster map using Excel file and calculating averages

I am working on my Master's thesis and have thought about using ArcGIS to create a raster map of latitude/longitude (0 to 360 degrees) temperature data (in Excel format). This temperature data ...