OpenTopography

Durham, NH: Hyporheic Zone Extent and Exchange in a Coastal Stream

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Overview: NCALM Seed Project PI: Danna Truslow, University of New Hampshire. The survey area is an irregular polygon approximately 16 km West of Portsmouth, NH and enclosing 42.5 square kilometers. The data were collected to study hyporheic zone extent and exchange in a coastal New Hampshire stream using heat as a tracer.

1a. Select area of data to download or process:   

Horizontal Coordinates: UTM z19 N NAD83 (CORS96) [EPSG: 26919]  -  Vertical Coordinates: NAVD88 (GEOID03) [EPSG: 5703]

Data Selection Coordinates:   Manually enter selection coordinates (in the horizontal coordinate system listed above)  

Xmin =

Ymin =

Xmax =

Ymax =

Xmin =

Ymin =

Xmax =

Ymax =

1b. Choose Return Classification:

Ground    Unclassified    All

2. Point Cloud Data Download:

Point cloud data in LAS format

Point cloud data in LAZ format

Point cloud data in ASCII format

3a. DEM Generation (Local Gridding):  

Gridding Method      Calculate Zmin grid      Calculate Zmax grid      Calculate Zmean grid      Calculate Zidw grid      Calculate point count grid

Gridding Parameters   Grid Resolution (Default = 1 meter):   Radius value (Default = 1 meter):

Grid Format   Arc ASCII Grid GeoTiff IMG All formats Null Filling      None357

3b. DEM Generation (TIN):  

Gridding Method      Calculate TIN

Gridding Parameters   Grid Resolution (Default = 1 meter):   Max. triangle size (Default 50 units):

Grid Format   Arc ASCII Grid GeoTiff IMG All formats

4. Derivative Products:  

Generate hillshade and slope grids in grid format:    GeoTiff IMG This option is only available when at least one grid is selected in step 3a and 3b (DEM Generation: Zmin, Zmax, Zmean, Zidw or TIN) above.

5. Visualization:  

Generate hillshade images and Google Earth files from DEMs

Altitude of the light,  (in degrees):     Azimuth of the light, (in degrees):     Generate additional color-relief and colored hillshades

This option is only available when at least one grid is selected in step 3a and 3b (DEM Generation: Zmin, Zmax, Zmean, Zidw or TIN) above.

Job Description

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