Model:TopoToolbox

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TopoToolbox

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Tool Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 2D Spatial extent Regional-Scale, Landscape-Scale, Watershed-Scale Model domain Hydrology, Terrestrial One-line model description A set of Matlab functions for topographic analysis Extended model description TopoToolbox provides a set of Matlab functions that support the analysis of relief and flow pathways in digital elevation models. The major aim of TopoToolbox is to offer stable and efficient analytical GIS utilities in a non-GIS environment in order to support the simultaneous application of GIS-specific and other quantitative methods. With version 2, TopoToolbox adds various tools specifically targeted at tectonic geomorphologists such as Chiplots and slopearea plots. Keywords: topographic analysis, geomorphology, geomorphometry, Matlab, Name Wolfgang Schwanghart Type of contact Model developer Institute / Organization Institute of Earth and Environmental Science Postal address 1 Geohazards Postal address 2 Karl-Liebknecht-Str. 24-25 Town / City Potsdam-Golm Postal code 14476 State NO STATE Country Germany Email address w.schwanghart@geo.uni-potsdam.de Phone Fax Name Dirk Scherler Type of contact Model developer Institute / Organization Postal address 1 Postal address 2 Town / City Postal code State Country Email address Phone Fax Supported platforms Unix, Linux, Mac OS, Windows Other platform Programming language Matlab Other program language Code optimized Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2008 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through CSDMS repository Source web address Source csdms web address https://github.com/csdms-contrib/topotoolbox Program license type Other Program license type other GNU version 2 or later Memory requirements Typical run time Describe input parameters GeoTiff, ESRI ASCII digital elevation model Input format ASCII, Binary Other input format Describe output parameters topographic derivatives (slope, curvature, flow accumulation, drainage basins), flow paths, chiplots, swath profiles, among others. Output format ASCII Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? Yes If above answer is yes Matlab Other visualization software Describe processes represented by the model The TopoToolbox 2 is a Matlab based software for Digital Elevation Model (DEM) analysis. It uses an object oriented programming (OOP) approach to represent and work with geoferenced raster data, flow directions, stream networks and swath profiles in Matlab. TopoToolbox offers a wide range of tools to analyse DEMs, flow and stream networks, that allow for interactive and automated workflows. Describe key physical parameters and equations none Describe length scale and resolution constraints All spatial data should be provided as projected, georeferenced (e.g., UTM) grids or shapefiles where spatial units are given in meters. Data referenced in a geographic coordinate system will return unexpected results. Describe time scale and resolution constraints none Describe any numerical limitations and issues In general, Matlab stores all data in the main memory. Manageable grid size will depend on your available RAM. For conveniently working with grids with ~5000x5000 rows and columns, a 4Gb of RAM will likely be sufficient. Describe available calibration data sets Upload calibration data sets if available: Describe available test data sets Upload test data sets if available: Describe ideal data for testing Do you have current or future plans for collaborating with other researchers? I am always looking for people interested in improving and enhancing TopoToolbox. Is there a manual available? Yes Upload manual if available: Media:Usersguide 1 intro.pdf, Media:Usersguide 2 mfd.pdf, Media:Usersguide 3 ksn.pdf Model website if any Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component Is this a data component DOI model 10.1594/IEDA/100175 For model version 1.0.4 Year version submitted 2011 Link to file https://csdms.colorado.edu/pub/models/doi-source-code/topotoolbox-10.1594.IEDA.100175-1.0.4.tar.gz Can be coupled with:

Model info Authors Wolfgang Schwanghart Scherler Source code View in CSDMS GitHub repository DOI Download TopoToolbox version: 1.0.4 Doi: 10.1594/IEDA/100175 Model citations Nr. of publications: 36 Total citations: 1961 h-index: 15 m-quotient: 1.0 QR-code Link to this page Other models by author TopoToolbox

Introduction

TopoToolbox provides a set of Matlab functions that support the analysis of relief and flow pathways in digital elevation models. The major aim of TopoToolbox is to offer stable and efficient analytical GIS utilities in a non-GIS environment in order to support the simultaneous application of GIS-specific and other quantitative methods.

History

See the readme file in the distribution.

References

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Nr. of publications:	36
Total citations:	1961
h-index:	15
m-quotient:	1.0

Featured publication(s)	Year	Model described	Type of Reference	Citations
Schwanghart, Wolfgang; Kuhn, Nikolaus J.; 2010. TopoToolbox: A set of Matlab functions for topographic analysis. Environmental Modelling & Software, 25, 770–781. 10.1016/j.envsoft.2009.12.002 (View/edit entry)	2010	TopoToolbox	Model overview	326
Schwanghart, W.; Scherler, D.; 2014. Short Communication: TopoToolbox 2 – MATLAB-based software for topographic analysis and modeling in Earth surface sciences. Earth Surface Dynamics, 2, 1–7. 10.5194/esurf-2-1-2014 (View/edit entry)	2014	TopoToolbox	Model overview	780
See more publications of TopoToolbox

Issues

TopoToolbox is optimized for small data sets (grid size less than 2000 columns x 2000 rows, depending on your available main memory). This short-coming is due to various issues. First of all, Matlab loads all variables in the main memory and does not work on a file basis (such as ArcGIS for example does). Second, Matlab performs best for double precision data and sparse matrix operations currently only support for double precision data. Hence, all variables are stored as double precision, which requires large memory. 64-bit computers may overcome many of these weaknesses.

Help

There are a couple of short documents (userguide_xxx.m) including html-files in the distribution. Each function contains a comprehensive help section with syntax explanations and examples. For additional help, tipps and tricks, and news, please read my blog at http://topotoolbox.wordpress.com/

Input Files

There is a example file included in the distribution (srtm_bigtujunga30m_utm11.tif). Your own data should have the ESRI ArcGIS ASCII raster or Geotiff format and can be read using the function GRIDobj.

Output Files

Output can be written as ESRI ArcGIS ASCII raster and Geotiff format.

License notice

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.