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# 2015 Unmanned aerial system (UAS)-derived orthoimage mosaics and digital terrain models of the NE distal lava flow margin, Holuhraun lava flow-field, Vatnajökull National Park, Iceland

Preferred citation (DataCite format):

  Scheidt, Stephen P.; Hamilton, Christopher W. (2019).
  2015 Unmanned aerial system (UAS)-derived orthoimage mosaics and digital 
  terrain models of the NE distal lava flow margin, Holuhraun lava 
  flow-field, Vatnajökull National Park, Iceland.
  University of Arizona Research Data Repository.
  Dataset. https://doi.org/10.25422/azu.data.13269452.


Corresponding Author:   
  Christopher W. Hamilton, University of Arizona, chamilton@email.arizona.edu


License:
  CC BY-NC-SA 4.0


DOI:
  https://doi.org/10.25422/azu.data.13269452



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## Summary

Using a Phantom 3 Pro imaging system, aerial images were acquired over short
section of the NE Holuhraun lava flow margin, adjacent interior and adjacent
river systems. Images were initially geocoded using the device's onboard GPS
and a ground control points (GCPs) network. Final products were coregistered
to more precise geocoded image data collected later in 2016. Images were
processed into geodetically-controlled digital terrain models (DTMs) and
orthomosaics using the commercial software package Pix4Dmapper Pro version
2.0.81. In Pix4Dmapper Pro, data products were geocoded by attributing the 3D
coordinates of geocoded image coregistration targets to corresponding pixels
in a subset of 2D images. The 2016 image data used for coregistration utilized
DGPS measurements. To estimate the localization accuracy, we used a network of
N = 7 coregistration points; the resulting mean of the root mean square error
(RMSE) of x, y, and z directions (i.e., latitude, longitude, and elevation) is
2.7 cm. Both the DTM and orthomosaic products have a spatial resolution of 4
cm/pixel, but the DTM has an effective resolution of ~16 cm/pixel.  
  
 **Topic Categories (ISO 19115)** elevation, geoscientificinformation,
imageryBaseMapsEarthCover  
  
 **Feature and Attribute Definitions** A georeferenced raster displaying
elevation data generated from digital camera image data using multi-view
stereophotogrammetry methods.  
 **Date of Content** 2015-09-04  

* * *

  
 _For inquiries regarding the contents of this dataset, please contact the
Corresponding Author listed in the README.txt file. Administrative inquiries
(e.g., removal requests, trouble downloading, etc.) can be directed to data-
management@arizona.edu_  
 _This item is part of[Unmanned aerial system (UAS)-derived orthoimage mosaics
and digital terrain models of the northeastern portion of the Holuhraun lava
flow-field, Iceland](https://doi.org/10.25422/azu.data.c.5214641)_  



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## Additional Notes

Links:
  - https://doi.org/10.2458/azu_geo_holuhraun_landscape_evolution