Latest Contributions by ClaireParsons

I am running ArcGIS 10 and am trying to produce a schematic of a railway section using geographic data. I have run through the quick start tutorials but I seem to produce zilch when I try to create a diagram. I have even tried to produce a schematic from a few digitised lines that I know are topologically correct but still nothing. Am I missing something?  Is there some magic setting that I haven't pushed? Joking aside any help would be greatly appreciated as I have some members of staff manually creating schematics and it is taking along time. Many Thanks Claire PS - I have uploaded a pic of my basic network to see if anyone can see anything obvious. ... View more

I have a number of raster datasets in a folder that I want to sum/add together. I'm having trouble doing this - I've created a raster list but the output doesn't seem to be adding them together. Can someone help please. import arcpy, os from arcpy import env from arcpy.sa import * arcpy.CheckOutExtension("Spatial") arcpy.env.overwriteOutput = True env.workspace = r"C:\Users\Documents\GIS\Site Selection Example\Output Datasets\Cons_Raster" rasterList  = arcpy.ListRasters("*") for raster in rasterList:     print raster     # Execute CellStatistics     outCellStatistics = CellStatistics(raster, "SUM", "NODATA")     # Save the output     outCellStatistics.save("C:/data/sumRast.tif") thanks Claire ... View more

i hope someone can help - I have an number of mxd's in a folder each with the same layers in but a different spatial extent. I'd like to write a script that applies the definition query to the layer in each of these MXD's - can someone help? ... View more

I feel a bit embarrassed at asking this question and hope that i am not missing a really easy command to do this!! I have some parish boundaries and also some environmental datasets - I'd like to perform a spatial join to identify whether the parish falls in one of the environmental datasets. I don't really want to perform 10 spatial joins (the number of environmental datasets I have) is there another way? thanks Claire ... View more

Hi I'm fairly new to Python, so please bear with me. I need to create a link to a SQLServer database using OLEDB and i haven't got a clue where to start. Can someone help please? 😞 Many thanks Claire ... View more

I hope someone can help me with this - I have an mxd of datasets with broken thinks (person who created it - not me - didn't tick relative paths - DOH!).  Anyway the datasets aren't all in the same folder but follow this pattern; e.g. c:\data\GIS\SSSI\SSSI.shp c:\data\GIS\SPA\SPA.shp so what I need to do it rey and isolate \data\gis\...... and replace with the c: with f: and I'm not sure how to do this. Many Thanks Claire ... View more

Hope someone can help - I've written this script several times in the past but unfortunately my laptop is being serviced and I forgot to backup my python scripts directory - ~DOH 😮 Anyway, this should be really simple - I'm looping through some ascii files in a directory and converting them to a raster.  However, Python returns the error - Failed to execute (ASCIIToRaster). I know the ascii file is there as I have manually converted in toolbox and its fine.  I've posted the code below. # Import arcpy module import arcpy from arcpy import env # Local variables: env.workspace = "C:/Data/asc" outputraster = raster.rstrip("dtm.asc") datatype = "FLOAT" #Get a list of ascii files rasterList = arcpy.ListRasters() for raster in rasterList:     arcpy.ASCIIToRaster_conversion(raster,outputraster,datatype) ... View more