Model:TopoToolbox

Contact

Name	Wolfgang Schwanghart
Type of contact	Model developer
Institute / Organization	Physical Geography and Environmental Change
Postal address 1
Postal address 2
Town / City	Basel
Postal code	4056
State	NO STATE
Country	Switzerland
Email address	w.schwanghart@unibas.ch
Phone
Fax

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TopoToolbox

Metadata

Summary Also known as Model type Tool Model part of larger framework Note on status model Date note status model topographic analysis, Technical specs 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 Program license type Other Program license type other GNU version 2 or later Memory requirements Typical run time In/Output Describe input parameters ESRI ASCII digital elevation model Input format ASCII Other input format Describe output parameters topographic derivatives (slope, curvature, flow accumulation, drainage basins), network representations, other 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 Process Describe processes represented by the model Describe key physical parameters and equations Describe length scale and resolution constraints Describe time scale and resolution constraints Describe any numerical limitations and issues Testing 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 Other 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: Model website if any http://physiogeo.unibas.ch/topotoolbox/ Model forum / discussion board Comments Download statistics <pbars ytitle=Downloads Title='Monthly Downloads topotoolbox' xlabels=true size=900x200 ymax=140 grid=true box=true cubic=true plots=open xformat=number connected=true angle=90 legend> ,Total downloads: 2799 2008 - Jan,0 Feb,0 Mar,0 Apr,0 May,0 Jun,0 Jul,0 Aug,0 Sep,0 Oct,0 Nov,0 Dec,0 2009 - Jan,0 Feb,0 Mar,0 Apr,0 May,0 Jun,0 Jul,0 Aug,0 Sep,0 Oct,0 Nov,0 Dec,0 2010 - Jan,11 Feb,57 Mar,60 Apr,49 May,52 Jun,31 Jul,50 Aug,46 Sep,53 Oct,67 Nov,40 Dec,41 2011 - Jan,62 Feb,37 Mar,34 Apr,33 May,33 Jun,20 Jul,45 Aug,19 Sep,18 Oct,22 Nov,52 Dec,23 2012 - Jan,29 Feb,32 Mar,45 Apr,54 May,62 Jun,37 Jul,33 Aug,20 Sep,16 Oct,34 Nov,25 Dec,17 2013 - Jan,24 Feb,39 Mar,48 Apr,17 May,37 Jun,40 Jul,28 Aug,49 Sep,42 Oct,44 Nov,47 Dec,41 2014 - Jan,62 Feb,66 Mar,58 Apr,72 May,65 Jun,69 Jul,29 Aug,52 Sep,67 Oct,82 Nov,90 Dec,76 2015 - Jan,67 Feb,129 Mar,0 Apr,0 May,0 Jun,0 Jul,0 </pbars> 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. Papers Schwanghart, W., Kuhn, N. J. (2010): TopoToolbox: a set of Matlab functions for topographic analysis. Environmental Modelling & Software, 25, 770-781. DOI: http://dx.doi.org/10.1016/j.envsoft.2009.12.002 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 is a short documentation (userguide.m) including html-files in the distribution. Each function contains a comprehensive help section with syntax explanations and examples. A comprehensive function overview and description can be found at http://physiogeo.unibas.ch/topotoolbox/doc/index.html Input Files There is a example file included in the distribution. Own data should have the ESRI ArcGIS ASCII raster format and can be read with the function rasterread. Output Files Output can be written as ESRI ArcGIS ASCII raster format using the function rasterwrite. Download source code 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.