Latest Contributions by EricaNewton

I had a problem where my .tif rasters were not appearing when zoomed out.  A friend recommended that I go into Properties-->Display-->Resample during display using: and change this to "Majority".  Solved my problem.  Hope this helps someone. ... View more

Is there any (simple) way to find the row and column number of a pixel in a raster?  Not the VALUE of the pixel, simply its location in terms of rows and columns. Thank you! ... View more

Hi there, I have been trying to find a way to tell GIS to look in a folder and get me all .jpg files without the string _TIR in it. So far I have tried iterating through the folder using "iterate rasters" in model builder, but I don't know how to specify a wildcard to be NOT something rather than something, and whenever I try to test it using a wildcard to find TIR, it only spits out one raster that it places in the TOC (I want all of them). Another way to do it would be to use python listRasters and arcpy.CopyFeatures_management to move the files I want to a new folder and then import them all together, but I still can't figure out how to specify that I don't want something in the text string. Can anyone help?  I feel like it is a really simple solution, but I just can't find it! Thanks so much. ... View more

Hi there, I am new to python and attempting to set up a batch process to reproject rasters in a folder.  This is the script and error message I am getting.  I defined the projection of the rasters in the folder to WGS 1984 UTM Zone 16N before starting. >>> import arcpy ... arcpy.env.workspace = r"C:/GIS/NDVI/Georef_27_21_TIFFs/test" ... rasterList = arcpy.ListRasters("*", "All") ... for raster in rasterList: ...     print raster ... outraster = raster+"_ontlambproj" ... arcpy.ProjectRaster_management("raster", "outraster", "MNR_LAMBERT_PROJECTION_3161.prj", "NEAREST", "30", "WGS_1984_(ITRF00)_To_NAD_1983", "#", r"C:/Program Files/ArcGIS/Desktop10.0/Coordinate Systems/Projected Coordinate Systems/UTM/WGS 1984/Northern Hemisphere/WGS 1984 UTM Zone 16N.prj") ... L5027021_02119850802_B30.TIF LT5027021008516650_B3.tif Runtime error <class 'arcgisscripting.ExecuteError'>: Undefined coordinate system for input dataset. Can anyone help me determine why I am getting this error? Thank you so much! Erica ... View more

I've been working on a solution to this problem for a while now so thought I'd post the workaround that I found. I am importing landsat bands and attempting to reclassify the DN Values 0-255 into two new classes, for example 0 and 1.  For most bands, using the reclassify function works.  However, for some band files, reclassifying either does not work and I get an error message, The input raster minimum/maximum (huge number) is out of range.  To ensure a correct reclassification, edit ranges or use a different precision settings in the reclassification dialog box. Sometimes the reclassify tool works, but my output is incorrect - an image showing vertical lines or bands with values 0 and no data. I tried to calculate statistics first because I noticed that this file, unlike the other files I worked with, did not have statistics calculated, but when I tried that I get the error message, Invalid drop item:  One or more dropped items were invalid and will not be added to the control. My solution: Build an attribute table for the raster data set. Build Statistics by clicking the symbology tab "discrete color". Reclassify the raster by using the tool "reclass by table".  I built the table in the reclassify tool - it's easy there to create and save a table based on your preferences for the reclass function. This successfully built a correctly reclassed image for me. Hope this helps someone struggling with the same problems! ... View more