Latest Contributions by PrasantaBhattarai

Thanks guys that does the trick! The only thing I'm finding now though is that the rectified raster now has a big black square around it. Is there anyway of removing this or making it transparent? You can make it transparent by displaying the pixel value of 0,0,0 as NoColor - Open properties for the image - Go to symbology tab - check on the display background value 0,0,0 as NoColor. This will however make any valid 0,0,0 pixels from the image as no color. If you need remove the black area permanently from the raster dataset, you might have to clip the black portion out using Clip (Data Management) tool. ... View more

When I run "reclassify," I always get extra classes that I don't want. I am making sure to include the max and min values of the raster when I reclassify. What's going on here? Are you getting these extra class when running reclassify for various datasets? How about when you check on "Change missing values to NoData"? ... View more

I have a landsat image, and when I crop out a small subset of the image the colors are totally different.  It's a question of matching the colors of the new clipped landsat image against the original-full extent landsat image.  It's not simply restoring the colors to the same image.  Any advice? Thanks again for the reply. If your clipped image looks different in color than the original imagery after clipping, it might just be the stretch type being used for the raster. If the statistics of an image is calculated (for example, when clipping), by default ArcMap displays it with a stretch of standard deviation. For the clipped raster, from symbology, change the stretch type to "None" and see if the image looks like the original image. Here's a blog "Is your raster so bright you have to wear shades?" which discusses about this issue. I hope this helps!! ... View more

How are you downloading the tutorial and examples (which link are you using)? If you have already installed CityEngine 2012.2, you can open CityEngine, and go to Help menu > Download Tutorials and Examples. You can then select the tutorials and examples you want to download by checking them on and clicking finish. I have tested this even for CityEngine Trial, and it works. Also, If you are looking for video series for CityEngine, you can find it here. ... View more

I have sid aerial photos of 4 townships that cover my community. I was wondering if there was a toolbar function to combine these 4 .sid raster files in to one layer.  Working on ArcView 10.  No SDE. If you are trying to merge 4 SIDs into a single raster dataset, you can use the mosaic to new raster geoprocessing tool, or use processing tool (mosaic) from Image Analysis window in (ArcGIS 10) - see the screen capture below. However, please remember that if you are mosaicking using image analysis window, the output is temporary. You will need to make it permanent by exporting it from the TOC. Also, when saving your image, you will not be able to save it as a SID and output raster might be lot larger in size than your original SIDs. Using the Mosaic button on the Image Analysis window [ATTACH=CONFIG]13119[/ATTACH] ... View more

Yes, I am aware that the problem existed early in ArcGIS 9, but the note at the bottom of the page indicates it was corrected in later versions. I'm using ArcGIS 10. I think the problem mentioned on the note of the knowledge base article is that in ArcGIS 9.0, even if you select bilinear or cubic, it always uses nearest (default). This issue was fixed on 9.1. However, even in 10 nearest is the default resampling technique for project raster tool. Please make sure you are using either Bilinear or Cubic when projecting the DEM (as in screen capture below). If you still seeing the artifacts after this, I would suggest you to log a support incident so that we can look into this. [ATTACH=CONFIG]12913[/ATTACH] ... View more

Hi, Is it possible to make tiff images that has this layers order: red - band5, green - band4, blue - band3? In arcgis, i can change those bands, but that's only for viewing. I would like to have a tiff image that looks like the one in arcgis. If you want to create a tiff image with band order (R, G, B) as 5, 4, and 3, you can run Composite Bands tool which will allow you to create a single raster dataset from multiple bands. When running the tool, you will have to enter the desired band (for eg. 5, 4, 3 for red, green, and blue) as input raster so that you get a correct band combination on the output raster dataset. Please note that the output raster will be a 3 band raster with band numbers as 1, 2, and 3. [ATTACH=CONFIG]12422[/ATTACH] ... View more

Hi I had a data of X,Y and Z coordinates (points). I created TIN using that date. But the problem is that it does not look good. I need to create high precision terrain with smoother angles (also for 3D view). Can you help me? [ATTACH=CONFIG]12394[/ATTACH] [ATTACH=CONFIG]12395[/ATTACH] As Gayu suggested, you can create a raster from TIN to get smoother surface. However, if you want a smoother TIN, you can convert (smoother) raster to a TIN. You can use the input point feature to create a smooth surface using the interpolation tools. Once you get a smooth surface from your points, convert the raster into TIN. You can use the optional parameter Z_Tolerance to set the maximum allowable difference in (z units) between the height of the input raster and the height of the output TIN. Here's how Raster to TIN works. ... View more

Hi Cathy, If you have Spatial Analyst extension, here's what you can try: 1. Create a polyline for the boundary of your raster - Reclassify your raster to 1 value. - Convert Raster to Polygon > Buffer it inside with 1/2 the cell size and convert it to Line 2. Run Extract by mask tool and use the polyline feature as mask. 3. Convert your output (mask) raster into points. (grid_code is the pixel values from your runoff raster for each cells) If you have 3D Analyst extensions, here's what you can use: 1. Use the Raster Domain tool to create a 3D polyline 2. Convert each vertices of the polyline into points using Feature Vertices to Point (requires ArcInfo) 3. Run Add Z information tool to get Z values into the attribute table for the points. (Z values are the pixel values from your runoff raster for each cells). Hope this helps!!! ... View more

I'm having trouble getting the raster calculator to work in ArcMap 10.3 with spatial anlayst extension. I'm using the raster calculator to do something simple like add or subtract 100 from each cell in the raster. I use the following expression Float ("raster") - 100.0 The tool runs fine, but the results are strange. A DN in the original raster of 47 returns a value of -36. A DN of 26 returns a -48. I've also tried dividing two rasters (using Float), when I do that I get all 1's. Please advise. Hi Jeff, I ran a quick test with raster calculator (see attached screen-captures) to subtract and divide, and it seems to be working fine for me. Input data I was using is an integer raster (.TIF) and the output is a floating point raster (.TIF). If you can consistently reproduce this issue with different data, I would suggest you to contact Support so that we can take a further look at it. [ATTACH=CONFIG]12181[/ATTACH] [ATTACH=CONFIG]12182[/ATTACH] [ATTACH=CONFIG]12183[/ATTACH] [ATTACH=CONFIG]12184[/ATTACH] ... View more

Hi, First create a slope raster from your DEM using Slope (Spatial Analyst) tool. Once you have the slope raster, you can use Zonal Statistics as Table (Spatial Analyst) tool to calculate MEAN values of slope for each Zone (parcels or storm water route). ... View more

From the help documentation: Using the Is Null in conjunction with the Con tool, you can change NoData values on a raster to any desired value while retaining the original non-NoData values for the remaining cells. --- To change NoData value to 0, you can simply use the raster calculator with following statement: Con(IsNull(raster), 0, raster). [ATTACH=CONFIG]11938[/ATTACH] ... View more

There are a few ways to get around it. 1. From Layer Properties > Symbology > Check on Display Background Value: (R,G,B) 0,0,0 as NoColor. The down side of this is, if you have a valid pixel of RGB value 0,0,0 within your image, it will also be set to NoColor. Also, sometimes your bordering pixel values are not always 0,0,0. In this case you will see noise of random black pixels. 2. If you have (or create) boundary file for each raster (excluding black pixels), you can use Clip raster tool.  Make sure you check on the "use input feature for clipping geometry" option. This way, whatever is outside the clipping feature will be set to NoData. 3. If you have Editor/Info license, you can also explore the option of storing your images inside a Mosaic Dataset. You can then recalculate Mosaic dataset footprints based on the radiometric values using the Build Footprints tool. ... View more

I tried adding hillshade function to a mosaic dataset and is working for me. When I initially added the hillshade function, the mosaic dataset became black. However, after calculating statistics, it was displaying as expected. what service pack are you on? Make sure you have the latest service pack for ArcGIS Desktop. Do you have background processing ON? If so, try disabling background processing (Geoprocessing > Geoprocessing Options > Uncheck Enable under Background Processing) and calculate statistics for your mosaic dataset again. See the attached video for details. ... View more

I would give it a shot to extract the ISO file. These files could be extracted (like the zipped folder) using programs like 7z or WinRAR. Once you extract the ISO, you should see the images on the extracted folder (if the ISO file contains Images). [ATTACH=CONFIG]11797[/ATTACH] ... View more