====== Comparing the Performance of Dinamica EGO   ======

Thanks to its [[http://www.csr.ufmg.br/dinamica/training/2_EGO_framework.pdf|innovative framework]], which includes 64-bit native version, parallel processing using a hybrid method named task + work stealing and smart management of data flow, Dinamica EGO can far surpass performance of most common GIS. 
 
===== Least Cost Pathway Calculation =====

==== Dataset and Models ====

<note>
The test data and the models used in the comparison can be downloaded at [[http://www.csr.ufmg.br/wiki/performance_test.zip|here]].
</note>

The example consists of two sets of maps extracted from IDRISI tutorial: land use map (worcwest), source map (newplant) and destination map (powerline). The first one at 15 meter resolution composed of 960 columns x 960 rows and the second at 5 meter resolution composed of 2880 columns x 2880 rows (respectively, folders ''resource'' and ''resource5''). Dinamica EGO models are in folders ''ego_15m'' and ''ego_5m''; we made available models with 2, 3 passes and optimum solution. In general, only two to three passes are needed to approximate to an optimum solution. Respective models implemented on MacroModeler are located in ''Idrisi_15m'' and ''Idrisi_5m'' ((you might need to specify the working directory before running the Idrisi model)), and folder ''arcgis'' contains the ModelBuilder model((Go to Arctool; you will need to add the model as a toolbox and then click on it to open and run the ModelBuilder model)).

==== Results ====

Figures below show the pathways calculated with three passes and another with optimum solution using Dinamica EGO as well as the pathways output from MacroModeler and ModelBuilder. 

{{:ego3_optimum1.png?nolink&300|Results produced by Dinamica EGO}} {{:ego3_optimum_idrisi_arcgis.png?nolink&300|Comparison of results produced by all softwares}}


==== Final Thoughts ====

Check out yourself this comparison downloading the test data and running the models on your computer. Any doubts please contact [[dinamica@csr.ufmg.br]].