📄️ DEM Differencing
A DEM (digital elevation model) of Difference (DoD), is the result of DEM differencing. DEM differencing is the simple act of subtracting the elevations of an older DEM from the elevations a newer DEM on a cell by cell basis:
📄️ Error Propagation
Background Theory on Error Propagation
📄️ Change Detection Challenges
A few years back, Joe was asked to give a talk on the Challenges and Trends in geomorphic change detection. The slides pretty much lay out my arguments (i.e. its time we moved past the pretty pictures & methods... and get back to geomorphology):
📄️ Budget Segregation FAQ
Here is a little description of how budget segregation works "under the hood". This is all internal workings that you don't need to know but it might help with the understanding:
📄️ Fuzzy Inference Systems for Modeling Errors
Background on Fuzzy Inference Systems
📄️ GCD Projects and File Structures
GCD organizes data and analyses into "projects". GCD projects are self contained. You can move the folder containing the GCD project to a different location on your computer and it will continue to work. You can also compress a GCD project folder into a zip archive and share it with other users. A GCD project consists of three primary elements:
📄️ Research and Publications
GCD methodological development is described in (Wheaton et al., 2010a), the Wheaton (2008) thesis, and the Wheaton et al. (2010b) RRA paper. The Matlab version of the code (DoD 3) is provided as supplemental information with the ESPL paper so that readers can test or extend the code as they see fit for their purposes. The Milan et al. (2011) paper provides a nice overview of basic change detection methods and Williams (2012) provides a nice overview of DEM of Differencing.
📄️ ToPCAT Decimation
Summary
📄️ Data Preparation - Best Practices
The GCD software does what it can to help you through the process of preparing your data for analysis. However, there are a number of concepts and best practices you can undertake to exert more explicit control on these factors as well as help ensure that your processing goes smoother.