There should not be any blank lines in the fcd file if so, the program will not run. The easiest way to create the class properties file is to open the attribute table for each grid file , and from that information create the class properties file.
Here is a template fcd file you can start with. Open the Attribute Table in ArcMap; you need to ensure that the IDs and the Names in the fcd file match those in the raster attribute table. Note that the order of the entries doesn't matter, and that unmapped areas should be considered as the background class. Read over the Fragstats help file on creating the class descriptors file for further details open help and search for fcd. It is important that the syntax rules for the class properties file be followed that is, each field should be terminated by a comma, and there are no commas elsewhere in the file , or you will run into problems.
Once you have created the fcd file, Save As the file by explicitly setting the extension to. You may find that not all land uses listed in the legend. If the land use isn't present simply delete that row from the. To add the fcd file to your Fragstats analysis, you need to point to the file in the Common Tables section, as described below noting that there should be a unique fcd file for each year since the association between the Value and the legend.
Accept the program defaults for all of the other values. Note that you have to run Fragstats two times, once for each year raster file , and that the FCD file is specific to each year raster file i.
For the purposes of this lab you will only be examining a few selected metrics for each of the three grid files: Class metrics. Before producing the results , make sure that you have select the correct input file and FCD files in the layers list under File Management or Input Layers. You can then compare the results of your analyses and see how the landscape around Edmonton has changed over time.
You should ignore any results associated with those classes that have fewer than 50 cells. You will now create a transition matrix that shows how the land uses in changed over time i. The result of this operation will be a raster that contains the matches between the two input GRID rasters that is, the attribute table shows you what a cell was classified as in and what it was classified as in an illustration of what combine does--taken from the ESRI Help file for Combine--where InRas1 and InRas2 would correspond to your two land use rasters.
Name the output combine. This page is where you go to download the software, tutorials, diagnostic and other utility tools and learn about the latest release. Although we have done considerable testing of the software, it is possible that users will discover bugs that arise under specific conditions that we did not test please report all bugs immediately to Dr.
Kevin McGarigal, mcgarigalk eco. Patches to correct for bugs will be released with the same version number e. The latest build will be available from the download link below. Substantial changes to the software, primarily associated with the addition of new features e. Thus, it is important to check the release notes before downloading a new version. Similarly, all major updates to the Tutorials see below will be documented in the release notes. Please note, the current development version is 4.
We are no longer providing support for earlier versions. This software is in the public domain, and the recipient may not assert any proprietary rights thereto nor represent it to anyone as other than an Oregon State University-produced program version 2 , University of Massachusetts-produced program version 3 , or LandEco Consulting-produced Dr.
This is only fair and will eliminate many trivial questions. Acknowledgements Many individuals provided valuable feedback during the development and many revisions of the original software version 2 , including Steve Garman, Eric Gustafson, Jeff Nighbert, Tom Moore, Catherine Rogers, and David Wallin. We are especially grateful to Catherine Rogers and Eric Gustafson for their comprehensive and detailed testing of the original program and their many useful suggestions.
We are especially grateful to Claudia Regan for her support of the project. Until a general techical report is published, this website is the sole means of "publication" of the software. We suggest the following citation:. McGarigal, K. Computer software program produced by the authors at the University of Massachusetts, Amherst.
For more information, please contact: Dr. Downloads -- This page is where you go to download the software and documentation.
Links -- This page contains links to other web sites containing information on related software. Workshops -- This page contains links to workshop materials for any upcoming scheduled workshop.
Some of the key features of version 4 include: Graphical user interface. Command line execution. This will verify that you have a valid Spatial Analyst licence. In fact, ESRI data formats will not be accepted in any subsequent versions.
This happens when the grid is too large given other factors. This means that cells need to be approximately square, usually out to several decimal places. Although the grid description will say the cells are square, this can be an artifact of the rounding done for displaying purposes. Sometimes the non-square problem is beyond the first 14 decimal places, and ESRI does not allow you us to see more precision, even though it exist internally.
Unfortunately, re-sampling the grid with the same cell size does solve the problem. However, re-sampling the grid with a different cell size does solve the problem. Note, the functions we are using from their library are those that were published and partially documented 10 years ago, because these are the only functions they will allow third party access to.
In the meantime they have added many more functions that ArcGIS uses but nobody else can access. There is simply no ESRI documentation for handling situations like the one we're facing now. Thanks alot ESRI.
The workaround here is to either re-sample the grid with a sufficiently different cell size to get a clean square cell or go the convoluted way of converting to ASCII and then back to ArcGrid. For certain input formats ASCII and BINARY , this is not an issue because cells are assumed to be square and you are required to enter the cell size in meters in the graphical user interface, but for all others this information is included in the image header and must be defined correctly. For more information, please contact: Dr.
This page contains answers to frequently asked questions. Are there any limits to class ID values?
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