Monthly Archives: September 2015

New article on surface depression published in IJGIS

My new peer-reviewed article titled “A localized contour tree method for deriving geometric and topological properties of complex surface depressions based on high-resolution topographical data”  has been published in the latest issue of International Journal of Geographical Information Science, Issue 12. You can download a free online copy using this link: http://www.tandfonline.com/eprint/r34t6WVptm2hUgfjQc5r/full.  In this paper, we developed a localized contour tree method that is able to fully exploit high-resolution topographical data for detecting, delineating and characterizing surface depressions across scales with a multitude of geometric and topological properties. See some figures below:

multi-branch-depression_all_contour

Figure3_contour_tree

Figure6_dem_shadedrelief

Figure8_depression_levels

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Access Landsat Imagery in ArcGIS Pro

Related post: Landsat 8 data on Amazon AWS

Here’s how you can access the Landsat archive which is hosted on Amazon through ArcGIS Pro.

  1. Open the Projects Pane
  2. Click on Portal and then on the cloud icon on the far right to see everything that’s on your portal.
  3. Search for “Multispectral Landsat” in the search bar.
  4. Drag and drop.

To take advantage of the archive, we’ve designed a number of pre-defined band combinations and indices. You can find these from the Data tab, under Processing Templates.

Play around with these. Here’s some cool stuff that I found poking around in Alaska for a few minutes.

Read the rest of this entry

Whitebox GAT’s new website and other developments

Check out Prof. John Lindsay’s new Whitebox GAT website and the GoSpatial. A lot of cool and innovative stuff!!

“GoSpatial is a command-line interface program for analyzing and manipulating geospatial data. It has been developed using the Go programming language and is compiled to native code. The project is experimental and is intended to provide additional analytical support for the Whitebox Geospatial Analysis Tools open-source GIS software. GoSpatial can however be run completely independent of any other software and is run from a single self-contained executable file.”

Whitebox Geospatial Analysis Tools

There are a few exciting announcements related to new developments on the Whitebox GAT front. The first is that due to changes in the Google Code practices (it has become ‘read only’ and is no longer accepting new code commits), the Whitebox project has moved its source code repository to GitHub. I think that this will eventually make for improved source code management, although there may be some initial transition issues that we’ll need to work past. Some of the documentation will have to be updated to reflect this change.

The second announcement, which I am most excited about, is that I have finally found the time to update the Whitebox GAT website. There is a fresh new and more professional look to the site. I hope you enjoy the new webpage and as always, feedback is welcome. What would you like to see added or changed?

Lastly…

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