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Hi guys, I found some interesting Free Erdas Imagine Spatial Modeler Library provided by Sterling Geo. The models have been donated by Sterling Geo employees. They are free to download and use. Index Raster Buffer Around a Binary Image Active Fire Detection Using SWIR and NIR Band Sentinel-2 Cloud Removal Model Sentinel-2 NDVI Model Sentinel GRD 8-bit Colour Polarimetric Model Using ERDAS IMAGINE to Import .asc Files Importing MODIS with NDVI Rescale Categorised NDVI Raster to Shapefile Operators Clump and Sieve Sub Model Area Values from a Thematic Raster Input NDVI Change Detection model Raster Image Segmenter RGB Point Cloud Encoder Performing a spatial radiometric transform using the Dodge Plus operator to enhance an image Two date Change Detection Visualisation Auto-colour thematic Raster Images Produce Four Output Sun-Shaded Datasets from a DEM Landsat 8 QA Cloud Mask Model Define Urban Areas in OpenStreetMap Extract Slopes Over a Certain Steepness Part 2 Worldview Radiance Converter Extract Slopes Over a Certain Steepness Part 1 Dividing a Scene into user Defined Slope Ranges Convert Thermal DN Values to At-Satellite Temperature Extract Areas of Flooding from Landsat 7 or 8 Images Calculate the Top of the Atmosphere Reflectance on Landsat 8 Images Classification Segmentation NDVI and Texture Model NDVI Threshold Mask Tree Mask from Height Data Relative Height Model More info: http://www.sterlinggeo.com/spatial-modeler-library-index/'>http://www.sterlinggeo.com/spatial-modeler-library-index/ Video Library: http://www.sterlinggeo.com/video-library.html'>http://www.sterlinggeo.com/video-library.html Their Website: http://www.sterlinggeo.com/ darksabersan.

Hi guys, this is Fin. I joined this forum two years ago mostly because of the tutorials on Geomatics. Never posted anything since most of the questions I have were/are already asked and addressed by most of you. Any body else out there from Pinas? Anyway, hopefully I can contribute more in this group other than being a lurker. Hehe!

other advice could be use your existing DEM to create height points and/or contours, then use the Topo to Raster tool to re-create a hydrologically correct DEM including your water network. I'm not 100% certain how different the resultant surface would be from your original DEM, though you can be sure it'll work for creating stream networks, if exact height measures aren't vital. The Topo to Raster tool also allows for other hydrologically significant features such as water bodies and known sinks (credit :http://gis.stackexchange.com/questions/18595/burning-stream-network-into-dem-layer-using-arcgis-desktop) regards