Shuttle Radar Topographic Mission (SRTM)

Definition

The Shuttle Radar Topographic Mission (SRTM) was an international research effort that utilized spaceborne radar technology to create a highly accurate topographic map of the Earth's surface. Conducted in February 2000, SRTM employed Interferometric Synthetic Aperture Radar (InSAR) to obtain elevation data across the globe, resulting in one of the most comprehensive digital elevation models (DEMs) available.

What is Shuttle Radar Topographic Mission (SRTM)?

The Shuttle Radar Topographic Mission (SRTM) aims to produce a detailed digital elevation model of the Earth's land surface. This mission used Interferometric Synthetic Aperture Radar (InSAR) technology, which involves two radar antennas mounted on a Space Shuttle. The principle of InSAR involves emitting radar signals towards the Earth's surface and capturing the reflected signals at different positions. By measuring the differences in the phase of the returned signals, the technology computes a highly accurate elevation model. The SRTM's end product is a global DEM with a resolution of about 30 meters, offering a crucial resource for various applications, including but not limited to climate research, land use planning, hydrology, and geology.

FAQs

How accurate is the SRTM data?

The SRTM data is considered to be highly accurate, with a vertical accuracy of around ±16 meters and a horizontal resolution of approximately 30 meters for most of the globe. The data has undergone rigorous validation and calibration processes to ensure its reliability for various scientific and practical applications.

What is the coverage area of SRTM?

SRTM provides near-global coverage, capturing data from latitudes 60 degrees north to 56 degrees south, effectively covering approximately 80% of the Earth's land surface.

How is SRTM data accessed?

SRTM data is publicly accessible and can be obtained through various governmental and scientific platforms dedicated to sharing geospatial data. The data sets are usually available for download in formats suitable for use in a wide range of GIS applications.

What are some applications of SRTM data?

SRTM data is employed in numerous fields, including topographic mapping, watershed and hydrology analysis, geological surveys, infrastructure development, and natural disaster management. Its detailed elevation information supports decision-making and scientific research globally.

Can SRTM data be integrated with other GIS data sets?

Yes, SRTM data can be integrated with other GIS datasets and is often used in conjunction with other sources of geographic information for enhanced spatial analysis and modeling. Its compatibility with standard GIS software allows for seamless integration and utilization in complex geospatial projects.