Citation:

PANGAEA.943854

Name: UAV-borne lidar campaign over Umiuaq, Hudson Bay, Canada in 2017 and 2018
Published: 2022-05-09
License: https://creativecommons.org/licenses/by-sa/4.0/
Keywords: Lidar; snow; snow accumulation; snow depth; snow height; Vegetation; Vegetation change; vegetation-environment interactions

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Abstract:

We performed high-resolution snow height measurements using drone-based lidar over two 0.5 km long areas near the community of Umiujaq, in Tasiapik valley. The North site is centered around (N:56.5684°; W:76.4895°, elevation 122 m) and the South site around (N:56.5594°; W:76.4816°, elevation 133 m). A snow-free survey was performed on 28-29 September 2017 and a snow survey on 25-26 April 2018. We produced 3 cm digital terrain and digital surface models (DTM and DSM) from the lidar cloud points for each site for both lidar campaigns.

Keyword(s):

Lidar; snow; snow accumulation; snow depth; snow height; Vegetation; Vegetation change; vegetation-environment interactions

Funding:

French Polar Institute of Research and Technology, Plouzané (IFRTP), grant/award no. 2014-4284: IPEV grant 1042

Institut Polaire Français Paul Émile Victor (IPEV), grant/award no. 1042 : ESCAPE-Arctic 3

Natural Sciences and Engineering Research Council (NSERC), grant/award no. 2018-03941: NSERC discovery grant

Coverage:

Median Latitude: 56.563900 * Median Longitude: -76.485550 * South-bound Latitude: 56.559400 * West-bound Longitude: -76.489500 * North-bound Latitude: 56.568400 * East-bound Longitude: -76.481600

Date/Time Start: 2017-09-28T00:00:00 * Date/Time End: 2018-04-26T00:00:00

Minimum Elevation: 122.0 m * Maximum Elevation: 133.0 m

Event(s):

Umiujaq_2017_SN * Latitude: 56.568400 * Longitude: -76.489500 * Date/Time Start: 2017-09-28T00:00:00 * Date/Time End: 2017-09-29T00:00:00 * Elevation: 122.0 m * Location: Hudson Bay * Method/Device: LiDAR (Light Detection And Ranging)

Umiujaq_2017_SS * Latitude: 56.559400 * Longitude: -76.481600 * Date/Time Start: 2017-09-28T00:00:00 * Date/Time End: 2017-09-29T00:00:00 * Elevation: 133.0 m * Location: Hudson Bay * Method/Device: LiDAR (Light Detection And Ranging)

Umiujaq_2018_WN * Latitude: 56.568400 * Longitude: -76.489500 * Date/Time Start: 2018-04-25T00:00:00 * Date/Time End: 2018-04-26T00:00:00 * Elevation: 122.0 m * Location: Hudson Bay * Method/Device: LiDAR (Light Detection And Ranging)

Comment:

We provide the DSM and DTm files as geotiffs for ease of use.

DSM_winter_3cm_NORTH.tif

DSM_summer_3cm_NORTH.tif

DTM_winter_3cm_NORTH.tif

DTM_summer_3cm_NORTH.tif

DSM_winter_3cm_SOUTH.tif

DSM_summer_3cm_SOUTH.tif

DTM_winter_3cm_SOUTH.tif

DTM_summer_3cm_SOUTH.tif

The filenames are split into 4 parts:

XXX_yyy_zzz_www.tif

XXX = Either DSM or DTM. For summer images, DSM corresponds to the surface elevation including vegetation and DTM to the surface elevation with the vegetation cover removed. For winter images, DSM corresponds to the elevation of the snow surface and vegetation sticking out of the snowpack, and DTM to the elevation of the snowpack with the vegetation ignored.

yyy = Either summer or winter. Summer corresponds to the snow-free acquisitions on the 28-29 September 2017. Winter denotes the snow-covered acquisitions acquired on 25-26 April 2018.

zzz = 3cm. The spatial resolution of the dataset.

WWW = Either SOUTH or NORTH. Indicates which site the survey was performed over.

The data are projected in EPSG: 2951 (NAD83(CSRS) / MTM zone 9).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device
1	Event label	Event		Lamare, Maxim
2	Latitude of event	Latitude		Lamare, Maxim
3	Longitude of event	Longitude		Lamare, Maxim
4	Elevation of event	Elevation	m	Lamare, Maxim
5	Date/Time of event	Date/Time		Lamare, Maxim
6	Date/Time of event 2	Date/Time 2		Lamare, Maxim
7	Binary Object	Binary		Lamare, Maxim	LiDAR (Light Detection And Ranging)
8	Binary Object (File Size)	Binary (Size)	Bytes	Lamare, Maxim	LiDAR (Light Detection And Ranging)

License:

Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA-4.0)

Status:

Curation Level: Basic curation (CurationLevelB)

Size:

8 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Date/Time	6 Date/Time 2	7 Binary	8 Binary (Size) [Bytes]
Umiujaq_2018_WN	56.568400	-76.489500	122	2018-04-25	2018-04-26	DSM_winter_3cm_NORTH.tif	673.1 MBytes
Umiujaq_2018_WN	56.568400	-76.489500	122	2018-04-25	2018-04-26	DTM_winter_3cm_NORTH.tif	673.1 MBytes
Umiujaq_2018_WS	56.559400	-76.481600	133	2018-04-25	2018-04-26	DSM_winter_3cm_SOUTH.tif	1.1 GBytes
Umiujaq_2018_WS	56.559400	-76.481600	133	2018-04-25	2018-04-26	DTM_winter_3cm_SOUTH.tif	1.1 GBytes
Umiujaq_2017_SN	56.568400	-76.489500	122	2017-09-28	2017-09-29	DSM_summer_3cm_NORTH.tif	769.8 MBytes
Umiujaq_2017_SN	56.568400	-76.489500	122	2017-09-28	2017-09-29	DTM_summer_3cm_NORTH.tif	769.8 MBytes
Umiujaq_2017_SS	56.559400	-76.481600	133	2017-09-28	2017-09-29	DSM_summer_3cm_SOUTH.tif	1.3 GBytes
Umiujaq_2017_SS	56.559400	-76.481600	133	2017-09-28	2017-09-29	DTM_summer_3cm_SOUTH.tif	1.3 GBytes