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5

The smoothing is actually a part of every hydrological analysis in gis (and in arcgis as well). The tool you may want to use is fill. This tool fills sinks and remove peaks, adding functionalities such as the z-limit factor. Shortly, z-limit allow to keep sinks / peaks that exceeds the parameter's value.


0

Well this is one way of doing it, I'm sure there is a smarter raster way of processing it? Assuming your data is not the entire Amazon basin (!) turn your elevation into a point dataset, so each point has a unique ID and the elevation. In your image you depict your river network as a vector line, use that to select the points that are the points along ...


0

Obtain the elevation extremes by means of a Focal maximum and Focal minimum using a circular 10-km neighborhood. Use map algebra operations to complete the work. (Since you haven't described how the extremes will be used to estimate a slope, I cannot provide details.) If what you really want is a generalization of the 3 x 3 approach (which is not based ...


1

This thread may help you. Which talks of using Euclidean distance and Con tool to select a particular cell based on a conditionality. Conditional reclassification of a raster you may try using Euclidean distance to select the neighbouring cell based on the condition of a boundary of river network and the elevation difference.


0

http://desktop.arcgis.com/en/arcmap/10.3/map/styles-and-symbols/working-with-color-ramps.htm Using the above link and the colour picker in Photoshop to obtain the high and low colour RGB values, I was able to achieve the style of DEM that I posted.


1

The eye dropper tool works wonders if you don't know what the color is but want to figure it out. http://www.esri.com/esri-news/arcwatch/1214/finding-colors-on-maps-is-easy-using-the-eye-dropper-tool The trick in your case is that there is an underlying hillshade that is interacting with the colors. I'd pick a low elevation and a high elevation with ...


0

I have very little experience in using SAR data for DEM extraction, but from looking to the resulting unwrapped interferogram (upper right), the pixelated area seems to be the no data black area of the coherence image (water) where the software interpolated the elevation values between land areas. That can be normal due to the no-data nature of water areas. ...


0

If your DEM is a raster you can try to clip it using this tool.


4

One approach that our amazing intern recently used, which turned out really well for us: Fill the DEM Calculate flow direction on the filled raster Accumulate the flow of the flow direction output Do a Con operation to set all cells with an accumulated flow over some threshold (that is meaningful for your geographic area and for your cell size) to be 1 and ...


0

There are plenty of ways to create a DTM/DSM in both programs. All tools are good, but can be tweaked to give you results based on your precise needs - of which you haven't included any - in your question. Take a look at these tools, all of which were also discussed on gis.stackexchange, to find the one to best fit your needs ArcGIS - Topo to Raster QGIS ...


-2

Zonal stats worked perfectly thanks!! This is the video I found that explains how to use zonal stats: https://www.youtube.com/watch?v=HO1jNZitQBI


2

Solution assumes your classes are topologically correct polygons, i.e. there are no gaps and overlaps between them. Class defined by value stored in field GRIDCODE #define boundary between polygons and delete outer ones arcpy.PolygonToLine_management(in_features="polygons", out_feature_class="D:/Scratch/lines2D.shp", neighbor_option="IDENTIFY_NEIGHBORS") ...


1

Try Zonal Statistics or Zonal Statistics as Table Tool. The first I mentioned works with input raster dataset that you want to calculate statistics from and raster dataset or feature class that defines the zones. Only one statistics a ta time is supported here and you can select it from the drop-down menu. Result is raster dataset I think with the ...


1

Use Zonal Statistics or Zonal Statistics as Table. If you would like the result to be smallest elevation change then use DEM and pick RANGE as Statistics Type. If you would like the result to be minimum slope then use the result of Slope Tool instead of DEM and MINIMUM or the one thar suits you best as Statistics Type


2

I would look at the English Environment Agency's website which will provide you with 2m, 1m and in some areas 50cm resolution DTMs and DSMs. All you need to do is find some drumlins, this paper Subglacial bedforms of the last British Ice Sheet, Anna L.C. Hughes, Chris D. Clark & Colm J. Jordan could help. Here's an area of drumlins in 1 metre Lidar from ...


1

combined the colored GeoTIFFs with: gdalbuildvrt -srcnodata "0 0 0" -addalpha ouput.vrt water_rgb.tif land_rgb.tif after that, I exported the vrt as 3 band GeoTIFF


2

I use the following procedure with great success. Open "Processing" toolbox inside QGIS, click on "SAGA", click on "Raster creation tools", and finally click on "Triangulation". In the "triangulation" dialog box, select the shape file that has the data points used to create the contour. Choose the attribute field that has the elevation data, specify the ...


1

@FelixIP has the correct answer. My issue was that the dataset couldnot be processed on my perosnal workstation, with 8 GB of RAM. It required a powerstation with 128GB of RAM.


4

The toolbar is designed to work with a "SurveyGeodatabase", which is created in the first step of the Toolbar workflow. Unless you are working with a set of total station data, I think the toolbar is not the right fit for your needs/task. This step in the toolbar actually relies on ESRI's "TIN to Raster" Geoprocessing tool, which can be accessed from ...


0

Additional alternatives to visualize LiDAR point data or LiDAR DEMs within QGIS were also reported in the following posts: Visualizing a LiDAR point cloud in 3D with GRASS? - (GRASS; LiDAR .xyz). Importing LiDAR .txt in QGIS for map conversion - (QGIS, LiDAR .txt). Creating DEM from las file without using Lastools - (SAGA and Fusion; LiDAR DEM). How to ...


3

I've finally found a tool that does this. This task is referred to as mono-photogrammetry or monoplotting and involves referencing a single oblique and unrectified photo to a DEM to produce georeferenced data for use in a GIS. This is similar to photogrammetry, except you only have a single image. The WSL Monoplotting-Tool is specifically designed for this ...



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