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WoodTrax has designed a model to create drainage area (catchment) maps based on a culvert/bridge/arch locations (pour points) on a map.

The algorithm has been tried and tested on multiple locations and proves to be more accurate than human-derived catchments.

We can provide you with PDF documents, spreadsheets, 3D- models and shapefiles of your watercourse alteration projects at an affordable price.

Our model is based on generally accepted hydrologic processes that we have customized for accuracy. 

When you use our process your results are almost always better than what a human eye can create. 

We rely on the latest data from NASA, USGS, Canadian and provincial governments.

We can accept KML, KMZ, CSV, SHP files for processing. 

Map Marker is the ideal tool for for plotting your install locations. WoodTrax has tested a variety of apps and this FREE app outperforms them all.

1. Plot your locations on the app
2. Make your purchase below
3. Send the location file to maps@wwodtrax.com with your payment reference id. KML file format preferred. 
4. You can send other formats from other applications: CSV, KML, KMZ, SHP etc. are all fine. 

You can purchase a professional upgrade to Map Marker for around $15 USD and your license is good for life.

It is probably a good idea to make that purchase so the developer is motivated to continue supporting his app.