Point cloud data
Hubbard, T.D., Braun, M.L., Westbrook, R.E., and Gallagher, P.E., 2012, High-resolution lidar data for infrastructure corridors, Gulkana Quadrangle, Alaska, in Hubbard, T.D., Koehler, R.D., and Combellick, R.A., High-resolution lidar data for Alaska infrastructure corridors: Alaska Division of Geological & Geophysical Surveys Raw Data File 2011-3O. https://doi.org/10.14509/23363
Please visit: http://maps.dggs.alaska.gov/lidar/ to download a subset of the point cloud data associated with this publication. The complete set of point cloud data is available to users in LAS 1.2 format. The point cloud files total approximately 428GB. There are two options for copying the data to a hard drive: (1) DGGS will purchase a brand-new, 1 TB hard drive that you will be billed for when the data is picked up or sent, OR (2) you may provide a new, unopened* (in original packaging, including shrink-wrap) 1 TB or larger hard drive. The LAS files included in this dataset have been compressed using LASzip. LASzip is an open source lossless compression for LiDAR point cloud data in the LAS format that provides significant file size reductions. To uncompress the included .laz files, you can use the LASzip tool from our web site: http://maps.dggs.alaska.gov/lidar/bin/laszip.exe, or download the latest version directly from http://laszip.org. For all orders, please include: title and publication number. *The State of Alaska IT security policy prohibits non-State resources from being connected to a State of Alaska network. Thus, only unused drives can be used.
Layer Name: metadata
Layer Description: metadata files, read me files, reports, and ALL point cloud data
This metadata file was written to document and describe, as a whole, all of the classified laser returns (point cloud data) generated for this project. It provides a brief overview of the data acquisition, processing, and quality control steps utilized by DGGS contractors and subcontractors. We encourage users to review the delivery and quality control reports provided by Watershed Sciences, Inc. (WSI) and Oregon Department of Geology and Mineral Industries (DOGAMI) for a comprehensive discussion of their processes. These reports can be found on the citation page for this publication. The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships. Attribute information for the layers (entity) is included in this metadata file under the "Entity_and_Attribute_Information" section. The layers are titled:
>Point-cloud data - all returns - classified:Classified (ASPRS standard) LiDAR attributes for all returns
>Point-cloud data - ground returns - classified:Classified (ASPRS standard) LiDAR attributes for ground returns
Metadata is the data about the data and answers "Who, what, when, where, how and why?" about the dataset. Please see the DGGS Metadata README page for information about our metadata.
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
Alaska Division of Geological & Geophysical Surveys
3354 College Road
Fairbanks, AK 99709-3707
Phone Number: (907)451-5020
Fax Number: (907)451-5050