MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images Version 2

OSU/GIMP/ICE_VELOCITY_OPT
Dataset Availability
1985-03-01 - 2016-09-30
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("OSU/GIMP/ICE_VELOCITY_OPT")
Tags
greenland arctic polar ice velocity osu gimp nasa

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

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: https://doi.org/10.5067/VM5DZ20MYF5C. [Date Accessed].

DOI(s)

Explore in Earth Engine

var dataset = ee.ImageCollection('OSU/GIMP/ICE_VELOCITY_OPT')
                  .filter(ee.Filter.date('2016-01-01', '2016-09-15'));
var iceVelocityVis = {
  min: [0.0, 0.0, 0.0],
  max: [-1000.0, 0.0, 1000.0],
  bands: ['velocity_x', 'velocity_x', 'velocity_x'],
};
Map.setCenter(-66.82, 76.151, 7);
Map.addLayer(dataset, iceVelocityVis, 'Ice Velocity');

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