Latest Contributions by OliverBurdekin

‎07-25-2013

I'm trying to use Global Land Cover Characterization data from the USGS: http://edc2.usgs.gov/glcc/fao/data_specifications.php It is in the Interrupted Goode Homolosine projection. As I am working on a continental scale (South America) I need to reproject to WGS84. I've tried using the Goode Homolosine projection (land) in ArcGIS but the resulting raster was offset to the East by around 11km. I shifted this using the header file of the original .bil file. I need to clip it down to the area of my study site and so used a snap[ raster of existing data (worldclim data). The snap did not work and my GLCC raster is still warped and does not line up with underlying rasters.

‎12-06-2012

Hi Guys, I've been trying this out and need to do it pro grammatically as I have a lot of rasters I am iterating through to convert to .asc. I tried specifying this in the raster to ASCII tool but then I end up with %filename%.asc.TXT I also tried the suggestion above of using calculate value. I get this error when I run it: Executing: CreateEnvLayersFile C:\Users\OJB\Desktop\BurdsGIS\CollabPapers\Mimeticus\WorldClim\asc2 C:\Users\OJB\Desktop\BurdsGIS\CollabPapers\Mimeticus\WorldClim\tmin_clip NOT_RECURSIVE Start Time: Thu Dec 06 14:12:56 2012 Executing (Iterate Rasters): IterateRasters C:\Users\OJB\Desktop\BurdsGIS\CollabPapers\Mimeticus\WorldClim\tmin_clip # # NOT_RECURSIVE Start Time: Thu Dec 06 14:12:57 2012 Succeeded at Thu Dec 06 14:12:57 2012 (Elapsed Time: 0.00 seconds) Executing (Raster to ASCII): RasterToASCII C:\Users\OJB\Desktop\BurdsGIS\CollabPapers\Mimeticus\WorldClim\tmin_clip\clip_tmin_1 C:\Users\OJB\Desktop\BurdsGIS\CollabPapers\Mimeticus\WorldClim\asc2\e_clip_tmin_1.TXT Start Time: Thu Dec 06 14:12:57 2012 Succeeded at Thu Dec 06 14:12:59 2012 (Elapsed Time: 2.00 seconds) Executing (Calculate Value): CalculateValue newext("C:\Users\OJB\Desktop\BurdsGIS\CollabPapers\Mimeticus\WorldClim\asc2\e_clip_tmin_1.txt","asc") "def newext(file,ext):\n import os\n newfile = os.path.splitext(file)[0] + "." + ext\n os.rename(file,newfile)" Variant Start Time: Thu Dec 06 14:12:59 2012 ERROR 000539: Error running expression: newext("C:\Users\OJB\Desktop\BurdsGIS\CollabPapers\Mimeticus\WorldClim\asc2\e_clip_tmin_1.txt","asc") <type 'exceptions.WindowsError'>: [Error 123] The filename, directory name, or volume label syntax is incorrect Failed to execute (Calculate Value). Failed at Thu Dec 06 14:12:59 2012 (Elapsed Time: 0.00 seconds) Failed to execute (CreateEnvLayersFile). Failed at Thu Dec 06 14:12:59 2012 (Elapsed Time: 3.00 seconds)

‎04-10-2012

To help anyone else that is looking, the current workspace can be found via: IWorkspace ws = ((IDataset)ArcMap.Document.ActiveView.FocusMap.Layer[0]).Workspace; Looks good. Any ideas how to rewrite that for Java?

‎12-26-2011

Lauren Hi, and thanks for the reply. It's taken a while to get back to you as I must have forgotten to set the notify via email (I don't check my dashboard that often). But I will certainly try out the script you suggest. Sounds great. Your name jumped out too as I did the training seminar relating to regression analysis. I just wanted to take the opportunity to say thanks. It was a great seminar and really helped me out. All the best and Happy Holidays, Oliver

‎12-26-2011

Hi there, I'm looking at homeranges and using the Geospatial Modelling Environment tool (previously Hawth's tool) to do some KDE work. The population I'm studying lives in a confined area. I'd like to use the shapefile of their habitat to confine the probablility surface. So far I've found I can create the prob surface and then use the habitat shapefile to cut them out (method 1). However, this doesn't make sense as there is 0 probability they will be found outside of their habitat. I was wondering if anyone else had tackled this problem or if anyone knows how to use the border to confine the probabililty surface (method 2)? Or indeed if this is the correct method. I've looked at both Arc's KDE and GME's KDE functions but I can't seem to find anything to help. Processing extents or masks tend to cut of the probability surface meaning it replicates method 1. As always, any help would be appreciated. And Happy Holidays!

‎11-21-2011

Hi guys, I've been looking out for a script or some form of the iteration function in model builder that could really reduce workflows. I'm currently performing OLS on a dataset and have 13 possible explanatory variables (or fields). What I would like to do is run the OLS tool (and subsequently spatial autocorrelation) in order to find the best model (or best combination of explanatory fields). Granted it would be a lot of iterations but does anyone know if this exists?

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Date Last Visited	‎11-11-2020 02:24 AM

My Ideas

Latest Contributions by OliverBurdekin

Interrupted Goode Homolosine projection

Re: Raster to ascii

Re: Accessing current workspace using an ArcObjects add-in for ArcMap

Re: Field Iteration and OLS

Kernel Density Estimation in a confined area

Field Iteration and OLS