Latest Contributions by SamHuang

Hi guys, I'm trying to write a script that will reproject my tiff files(450 of em). The script also includes a loop that will loops through my files in a folder. Here's my code that i've already started off with and i'm not exactly sure where my problem is as I am still fairly new to it. Any pointers, suggestions and solution will be greatly appreciated! Thanks in advance! import arcpy try:         arcpy.env.workspace = r"D:Project Scripting\A1-4"                 # Get a list of Tiffs in the workspace.             #         rasters = arcpy.ListRasters("*", "TIF")         for raster in rasters:                 print "Processing: " + raster                 outRaster = raster+"_reprojected"                 arcpy.ProjectRaster_management(raster, outRaster,\                                "PSAD_1956_UTM_Zone_19S", "NEAREST", "",\                                "Peru96_UTM_Zone_19S", "", "") except:     print "Project Raster example failed."     print arcpy.GetMessages() When i ran the code it gave me the following response..... Project Raster example failed. ERROR 000622: Failed to execute (Project Raster). Parameters are not valid. ERROR 000628: Cannot set input into parameter out_coor_system. ... View more

Can someone explain what are the possible problems to why when i run my flow accumulation processing tool, it does not output the flow accumulation correctly. Let me provide you an image to show you what i'm talking about. As you can see within the attachment there is an image which shows the flow accumulation but it does not show entirely of where all the streams are flowing. The circled area are missing for whatever reason and I can't seem to find out what the reason is and how to solve this problem Thanks in advance! ... View more

Hi there, I like to find out how you can set multiple extents within python scripts. For instance setting one extent for clipping analysis follow by setting a new output extent in another clipping analysis ? Thanks in advance! ... View more

Hi guys, This issue has troubled me the last couple days and I'm turning to you guys in the hopes of actually finding out what the best way is to solve this problem. I have a dem file that I'm looking to manually edit specific individual pixel value. However, I'm not sure how to go about it in ArcGIS. IF anyone who has came across this issue or knows how to resolve. Please let me know. Much appreciated! ... View more

Hi guys, Just a quick question as i've been having trouble with my python script that I"ve been trying to implement. The issue here is that everytime when I try to run my script, I keep getting the following error ERROR 000358: Invalid expression Failed to execute (SelectLayerByAttribute). I believe there's an issue with the following section with its expression, but i'm not very clear how i can fix this. Anythoughts on this would be greatly appreciated! #select layer by attributes             arcpy.MakeFeatureLayer_management(unionwtrshd, 'unionwtrshdlyr')             exp2 = " \"FIDPAO_" + str(ws_id) + "\" = -1"             arcpy.SelectLayerByAttribute_management('unionwtrshdlyr', "NEW_SELECTION", exp2) and fyi, str(wd_id) is already defined. Essentially i'm trying to run a script where it goes through each files and grab their respective field 'FIDPAO_(wd_id)" Thanks! ... View more

I have a linear feature line (Stream line) That i extracted from a stream network, but for some reason I noticed that it did not extract properly as you can see from the image below there are gaps in between the line.  My question here is that How about Do i fix this issue so that my line doesn't have gaps ? Thanks in advance! [ATTACH=CONFIG]22530[/ATTACH] ... View more