Hunter Island Hauyat Village Site Elevation Point Data

This dataset is a bare earth model of the Hauyat Site on Hunter Island, British Columbia. The project was led by Dana Lepofsky of Simon Fraser University, and was run in partnership with the Hakai Institute and the Heiltsuk Integrated Resource Management Department (HIRMD).

Morgan Ritchie (morganritchie@yahoo.com) led a mapping team that collected 935 points with a total station in 2015.

The goal of the 2016 mission was to fill in the total station data, as well as to fill out the "wings" of the site.

The 2016 mission took place from June 4th-9th, 2016, at the Hauyat site on north Hunter Island.

The Hakai Institute field team (Keith Holmes and Will McInnes), did an RTK GPS survey (with a Topcon GR-5 RTK setup). We set up a base station on "Plum Island", the island in the middle of the bay in front of the Hauyat site.

We collected elevation points with the RTK, and we also collected burm/house features and rock locations.

Because of the challenges of the site for a GPS system - dense trees and north facing - the RTK GPS could not obtain a fix in the back part of the site.

We therefore also used a laser rangefinder to fill in some areas where there was no total station data and the RTK GPS could not collect points.

The survey for all data collection types was set up in Nad83 UTM9N, based on the datum of the RTK GPS. The total station and rangefinder data was therefore corrected to fit with the RTK data.

The Total station points were shot based on "station 1", which was set based on a handheld GPS. From station 1, 5 other stations were shot, that we could correct with the RTK GPS.

All of the total station data was first corrected based on the correction of station 1 from the RTK gps. It appeared that there was a rotation of the total station data by 9-10 degrees. The average rotation was 9.21 degrees between all of the stations, so that was the number used to rotate the total station points around station 1. After this rotation, it appeared to fit well with the RTK data.

The rangefinder data was converted to UTM points with trigonometry to convert from ranges to x and y coordinates.

To clean the RTK data, several points were removed which had erroneous elevation values.

Several points were also added Added from the UAV surface model on the other side of the river to help fill out the model.

File List: -HunterSurveyData.gdb - All GIS Files -HunterSurveyPts.csv - Elevation Points -HunterVillageFeatures.csv - Village Features

Guide to the files in the Geodatabase: -UAV_DSM_AnchorPts - Points with elevation values from the UAV DSM -TS_Rotated - Total station points corrected to fit with RTK data -RTK_FixedOnly - RTK points, filtered to only include fixed solutions -RTK_FixedCleaned - RTK fixed points with some erroneous points removed -RTK_Features - House/burm (PL), and rock (GATE) features - elevation no good -RTK_ALL - All RTK points -RangeFinder - all rangefinder points -ElevationModelInputs - Elevation data from all sources used to create final model (same as HunterSurveyPts.csv)

Guide to Attributes of ElevationModelInputs/HunterSurveyPts.csv -UAVH - Elevation from UAV -Source - Elevation data source -PTID - ID of the point if it exists -Z_Final - Final corrected elevation -UTM_E_Final - final corrected UTM Easting -UTM_N_Final - final corrected UTM Northing

Contact data@hakai.org for access to data. Ensure Dana Lepofsky, dlepofsk@sfu.ca, is consulted before access.

Access and Use

Licence: Appropriate credit must be given to Hakai Institute and the authors of the dataset.

Data and Resources

Dates

Metadata Created October 26, 2018, 22:48 (UTC)
Metadata Updated October 26, 2018, 22:48 (UTC)
Reference Date(s) 2016-04-30 (Creation)
2016-07-08 (Publication)
Frequency of Update
Metadata Date October 17, 2018, 21:46 (UTC)

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Map data © OpenStreetMap contributors

Additional Info

Field Value
Contact Email data@hakai.org
encoding utf8
metadata-language eng
progress completed
resource-type dataset
Responsible Party Hakai Institute (Point of Contact, Processor)
spatial-reference-system 26909