The white, mottled area in the right-center of this image from NASA’s
Shuttle Radar Topography Mission (SRTM) is Madrid, the capital of Spain.
Located on the Meseta Central, a vast plateau covering about 40 percent
of the country, this city of 3 million is very near the exact geographic
center of the Iberian Peninsula. The Meseta is rimmed by mountains and
slopes gently to the west and to the series of rivers that form the
boundary with Portugal. The plateau is mostly covered with dry
grasslands, olive groves and forested hills.
Madrid is situated in the middle of the Meseta, at an elevation
of 646 meters (2,119 feet). To the northwest of Madrid, and visible in the upper left of
the image, is the Sistema Central mountain chain that forms the “dorsal
spine” of the Meseta and divides it into northern and southern
subregions. Rising to about 2,500 meters (8,200 feet), these mountains
display some glacial features and are snow-capped for most of the year.
Offering almost year-round winter sports, the mountains are also
important to the climate of Madrid.
Three visualization methods were combined to produce this image:
shading and color coding of topographic height and radar image
intensity. The shade image was derived by computing topographic slope in
the northwest-southeast direction. North-facing slopes appear bright and
south-facing slopes appear dark. Color coding is directly related to
topographic height, with green at the lower elevations, rising through
yellow and brown to white at the highest elevations. The shade image was
combined with the radar intensity image in the flat areas.
Size: 172 by 138 kilometers (107 by 86 miles)
Location: 40.43 degrees North latitude, 3.70 degrees West longitude
Orientation: North toward the top
Image Data: shaded and colored SRTM elevation model, with SRTM radar intensity added
Original Data Resolution: SRTM 1 arcsecond (about 30 meters or 98 feet)
Date Acquired: February 2000