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Thank you for the answer Eric. i'm trying to replace the nodata cells with the 3x3 average window but didn't work please, see the attached images what might be wrong? thank you regards Jamal Hi Jamal, I reviewed your screenshot and you are specifying FOCALMEAN which is not a command in map algebra at 10.0. Please review my earlier post wherein I provide the syntax to use at 10.0. i.e. FocalStatistics Regards, Eric
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04-12-2011
01:55 PM
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it didn't work!!!! help, please Thanks Dan. I checked with the Arc10 Resource Center (URL: http://help.arcgis.com/EN/ArcGISDesktop/10.0/Help/00q8/00q80000006m000000.htm) for help with the syntax and case but unfortunately it's still not working: Con(IsNull([point2ras]), FOCALMEAN ([point2ras] , RECTANGLE , 3 , 3, data), [point2ras]) When I run the expression with that structure, Spatial Analyst returns an error saying that the name of the input raster is not defined. I inserted "" around the layer name, re-ran it, and got a different error ['expected a raster or layer name']. I've attached a screen-capture of the error messages, for reference. Any other suggestions? Thanks, Matt
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04-12-2011
11:02 AM
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is there a way to label the cells of the raster with theirs values? please, see the attached image that shows the question Thank you regards Jamal
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04-12-2011
10:18 AM
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Is there a tool to convert the cells of a raster to vector? Please, see the attached raster Is there a way to get the cells on this raster to vector such that each cell becomes a square in the vector class, therefore, the vector will contains feature equal to number of cells in the raster Of course, I know the tool ???raster to polygon???, but his doesn???t give the vector with individual squares Thank you Regards Jamal
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04-12-2011
09:56 AM
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How to replace the cells that have ???no data??? with average values of the neighbor cells? Please, see the attached image that shows my question Many cells in the given raster have no data, all what we need is to fill the ???no data??? cells??? with the average values of their neighborhood We need to fill all the area bounded by magenta border. How could we do that? Thank you Regards Jamal
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04-12-2011
09:45 AM
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Yes...That does make sense Patrick, thank you. Hi Jamal, When you run the Clip tool, it does not automatically update your Attribute Table. There is an enhancement request to have the Attribute Table updated. If you run the Build Raster Attribute Table tool, you will get the updated information. Patrick
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04-12-2011
06:18 AM
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anotehr note! i switched the origional raster to be of type GRID instead of being TIF...! then it did work!!!! but does this make any sense? why the format of the raster is important? why does it affect the result??? please, have alook on the attached image Jamal you have to set the extents explicitly in your Environments to be the extent of the layer used to clip the input raster
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04-12-2011
04:13 AM
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thank you for the answer. sure, i did...please, see the attached images Jamal The clipped raster has the same cell numbers as the original one!!! Why? Please, see the attached image that shows the case (particularly the tables!!!) The clipped raster has the same cell numbers as the original one (exactly the same) despite the fact that the clipped one is just a part of the original raster!!! Of course�?� really weird!!!!! What might be the problem? Thank you Regards Jamal
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04-12-2011
03:05 AM
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The clipped raster has the same cell numbers as the original one!!! Why? Please, see the attached image that shows the case (particularly the tables!!!) The clipped raster has the same cell numbers as the original one (exactly the same) despite the fact that the clipped one is just a part of the original raster!!! Of course??? really weird!!!!! What might be the problem? Thank you Regards Jamal
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04-12-2011
02:13 AM
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What is the effect of multiplying two rasters that have differnt cell size? please, see the attached image that shows my question? also, if they have the same cell size, should they be identical in the two rasters to be multiplied? what if they are of the same size in the two rasters but not identical? thank you regards Jamal
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04-11-2011
01:20 PM
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Has anyone calculate the carbon content of the forest based on an image of band4 and band5? The method: Biomass Volume = - 478.58 + 4.5041 ?? ND45 (Mt/ha) ND45 = 128 ?? ((TM4* - TM5*) / (TM4 + TM5)) + 128 Carbon = Biomass Volume ?? 0.5 (Mt/ha) Critical point: ??? The vegetation index includes water. Then how to extract the forest from this index? Based in which values? For example, the values of the NDVI are indicative: Very low values of NDVI (0.1 and below) correspond to barren areas of rock, sand, or snow. Moderate values represent shrub and grassland (0.2 to 0.3), while high values indicate temperate and tropical rainforests (0.6 to 0.8). in this case we can extract exactly what we need. In which sense is this applicable for ND45? ??? Do we need to process the pixel values of ND45 according to the average over 11x11 pixel window? Does this affect the result and the approach? ??? As the result of this approach is a raster that contains the values of carbon at each cell in (kg/ha), then is it correct to calculate the weight of carbon at each cell by multiplying the value of that cell with its area and then to sum all of these values up? Should we convert the area of the cell to ha (hectare) first or this is included in the equation? ??? Is this approach applicable if we have an image from Landsat ETM+? any idea? Thank you Regards Jamal
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04-06-2011
02:40 PM
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Where in the command �??Create TIN from feature�?� in ArcGIS 10? Please, see the attached image that shows my question Why the command �??Create TIN from feature�?� is not in the toolbox? or even in the pull down minue as in ArcGIS 9? Thank you
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03-03-2011
01:49 PM
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the command "Reclassify" gives wring result! Why? Please, see the attached image that shows my question I tried to reclassify the raster to 7 classes, but I got 7 classes and another one which I couldn???t know what it is!!! How to solve this problem so that I can have only 7 classes? Thank you
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02-26-2011
03:30 PM
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How to buffer the raster according the certain value of the cell? Please, see the attached image that shows my question I need to get a raster that represent a buffer of 500 m from the built up area (which have the cell value number 3). If the same problem is in vector, I use the buffer command then erase command. What are the equivalent commands for raster?
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02-18-2011
02:04 PM
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Is the command �??location allocation�?� existing in ArcGIS as in ArcInfo Worksation? The command location allocation find the best site location for facilities based on: The demand in each polygon The minim travel distance Assuming the number of facilities In ArcInfo workstation, if these data are given, then the best locations of facilities are plotted alongside with the spider showing the relation between each polygon and the facility Please, see the attached image This is different from the location allocation exisiting in Network analyst! what is the equivelent command in ArcGIS? Thank you
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02-09-2011
02:49 PM
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