- Dataset Availability
- 1985-03-01T00:00:00Z–2016-09-30T00:00:00Z
- Dataset Provider
- NASA NSIDC DAAC at CIRES
- Earth Engine Snippet
-
ee.ImageCollection("OSU/GIMP/ICE_VELOCITY_OPT")
- Tags
Description
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.
Bands
Resolution
100 meters
Bands
| Name | Units | Description |
|---|---|---|
velocity_x |
meter/year | Ice flow x velocity |
velocity_y |
meter/year | Ice flow y velocity |
error_x |
meter/year | Ice flow x error |
error_y |
meter/year | Ice flow y error |
Image Properties
Image Properties
| Name | Type | Description |
|---|---|---|
| CENTRAL_JULIAN_DATES | STRING_LIST | List of central Julian date for image pairs used in image. |
| FIRST_IMAGE_DATES | STRING_LIST | List of first image dates used in image. |
| NOMINAL_TIMES | STRING_LIST | List of nominal observation times for pairs of images. |
| PRODUCTION_DATE | STRING | Production date. |
| SECOND_IMAGE_DATES | STRING_LIST | List of second image dates used in image. |
| SENSORS | STRING_LIST | List of sensor pairs used in image. |
Terms of Use
Terms of Use
As a condition of using these data, you must cite the use of this data set using the given citation.
Citations
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:10.5067/VM5DZ20MYF5C. [Date Accessed].
DOIs
Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee.ImageCollection('OSU/GIMP/ICE_VELOCITY_OPT') .filter(ee.Filter.date('2016-01-01', '2016-09-15')); var iceVelocityVis = { min: [-1000], max: [1000], palette: ['red', 'black', 'blue'], bands: ['velocity_x'] }; Map.setCenter(-66.82, 76.151, 7); Map.addLayer(dataset, iceVelocityVis, 'Ice Velocity');