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location Vancouver, Canada
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visits member for 3 years, 7 months
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I am particularly interested in international projects and those focused on remote environments where there exists potential for interesting and meaningful analyses using GIS and remote sensing methodologies.


Jan
16
comment Why does ArcMap drag and drop report “one or more dropped items invalid”?
+1 The distinction between a 'layer' and the underlying 'dataset' is very important.
Jan
16
accepted Automatically create polygons from top right and bottom left coordinates?
Jan
16
answered Automatically create polygons from top right and bottom left coordinates?
Jan
16
comment Is a master's degree needed for a GIS career?
+1 for writing. Even if the field you choose is very technical (i.e. GIS), the ability write gives you a huge advantage. You might start your career digitizing roads, but nobody wants to do that for 30 years.
Jan
15
reviewed Approve suggested edit on Trasformation from ECEF to ENU
Jan
15
comment Estimating sunlight hours from slope, aspect, and latitude
You might consider using Area Solar Radiation (help.arcgis.com/en/arcgisdesktop/10.0/help../index.html#//…) if you're using ArcGIS. You can choose to use an entire year if you just want the total radiation. The input data requirements are simple. Though, I can't imagine that you would want to ignore latitude.
Jan
15
revised How to split a raster into multiple rasters using QGIS?
added 75 characters in body; edited title
Jan
14
answered ArcGIS 10 Field Calculator
Jan
14
answered Using python to Raster clip the extent to be the same as the display?
Jan
14
comment Creating Cluster “Zones”
Excel is not database software and is very limited in terms of its' ability to search data. PostgreSQL allows you to perform SQL queries (w3schools.com/sql/sql_intro.asp) on data across tables. In addition to this, Excel cannot store geometries, whereas PostGIS can. PostgreSQL runs on Windows just fine.
Jan
14
comment Creating Cluster “Zones”
This sort of problem is usually best handled using a database, especially if you intend to create queries utilizing multiple fields. Personally I would import all of the data into a Postgres database (including PostGIS to store the point geometries).
Jan
14
comment Slow processing with QGIS Raster Calculator- Size issue?
You could try taking a subset of your raster (500MB, 100MB...) and testing that. If it works at 100MB, but not at 500MB you know the issue is because of the size of the raster. Worst case scenario you have to subset the rasters a few times and merge them at the end.
Jan
14
answered Download data via a ftp server using polygon features
Jan
14
comment What are common mistakes when creating mosaic datasets?
It sounds like you need to define the projection when you import the images into ArcGIS: resources.arcgis.com/en/help/main/10.1/index.html#//…
Jan
14
comment Why does copying ArcSDE datasets and features in Python give ERROR 000732 & 000735?
Is this the line you are running: arcpy.CreateFeatureDataset_management(output, outfc)? If so, it's incorrect. If not, please update the code to reflect what you are actually trying to run. Copying the documentation doesn't tell us what you are actually trying to run.
Jan
14
comment Why does copying ArcSDE datasets and features in Python give ERROR 000732 & 000735?
If you're running the tool using the code you list above you are not using the correct inputs to the tool. As I said, you need to read the help documentation for these tools and check that your code reflects the proper inputs to the tools you are using.
Jan
13
comment Why does copying ArcSDE datasets and features in Python give ERROR 000732 & 000735?
You need to take a look at the help documentation for each tool. Specifically the INPUTS and OUTPUTS for each tool. Right now you have your input parameters all mixed up. Your parameter that is supposed to be an output geodatabase is currently an input feature class...
Jan
13
comment How to clip grid (based on points) leaving whole cells only using ArcGIS 10.1 for Desktop?
If the point layer is clipped by the boundary polygon first, followed by the steps @PolyGeo outlines above, this should achieve a solution to the entire question.
Jan
13
comment How to clip grid (based on points) leaving whole cells only using ArcGIS 10.1 for Desktop?
The question indicates 'polygon grid', so it looks to be a fishnet.
Jan
13
comment Why does copying ArcSDE datasets and features in Python give ERROR 000732 & 000735?
I have updated the above code to reflect a few other errors in the original posted code.