MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images Version 2 (OSU/GIMP/ICE_VELOCITY_OPT)
Version 2.0
This dataset, part of the NASA Making Earth System Data
Records for Use in Research Environments (MEaSUREs) program,
consists of mean monthly velocity maps for selected glacier outlet areas.
The maps are generated by tracking visible features between optical
image pairs acquired by the Landsat 4 and 5 Thematic Mapper (TM),
the Landsat 7 Enhanced Thematic Mapper Plus (ETM+), the Landsat 8
Operational Land Imager (OLI), and the Advanced Spaceborne Thermal
Emission and Reflection Radiometer (ASTER).
Note
Monthly means are calculated from images, which may have acquisition
dates from the preceding or succeeding month. For the naming convention,
the month is determined from where the midpoint Julian dates fall.
For example, September monthly means may have been generated from
images that were acquired in August or in October but the midpoint
Julian date between the images falls within September. The exact
dates used are included as per-image metadata fields.
| Name | Description | Gee:unit |
|---|---|---|
| velocity_x | Ice flow x velocity | meter/year |
| velocity_y | Ice flow y velocity | meter/year |
| error_x | Ice flow x error | meter/year |
| error_y | Ice flow y error | meter/year |
Providers | |
|---|---|
| National Snow & Ice Data Center (producer, licensor) | |
| Google Earth Engine (host) | |
| STAC Version | 0.6.2 |
| Keywords | GIMP, NASA, OSU, arctic, greenland, ice, polar, velocity |
| License | proprietary |
| Temporal Extent | 2/28/1985, 4:00:00 PM - 9/29/2016, 5:00:00 PM |
| DOI | https://doi.org/10.5067/VM5DZ20MYF5C |
| Citation | Howat, I. 2017. MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: [https://doi.org/10.5067/VM5DZ20MYF5C](https://doi.org/10.5067/VM5DZ20MYF5C). [Date Accessed]. |
| Type | image_collection |
| GSD | metersm |
| cube:dimensions | {"x":{"type":"spatial","axis":"x","extent":[-89.3211593425295,7.555941634834938]},"y":{"type":"spatial","axis":"y","extent":[58.79601275381146,83.95386175580668]},"temporal":{"type":"temporal","extent":["1985-03-01T00:00:00Z","2016-09-30T00:00:00Z"]},"bands":{"type":"bands","values":["velocity_x","velocity_y","error_x","error_y"]}} |