Potmesil, M.: Maps alive : viewing geospatial information on the WWW (1997)
0.03
0.027261382 = product of:
0.081784144 = sum of:
0.081784144 = sum of:
0.04058554 = weight(_text_:search in 2703) [ClassicSimilarity], result of:
0.04058554 = score(doc=2703,freq=2.0), product of:
0.17614716 = queryWeight, product of:
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.050679956 = queryNorm
0.230407 = fieldWeight in 2703, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.475677 = idf(docFreq=3718, maxDocs=44218)
0.046875 = fieldNorm(doc=2703)
0.041198608 = weight(_text_:22 in 2703) [ClassicSimilarity], result of:
0.041198608 = score(doc=2703,freq=2.0), product of:
0.17747258 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679956 = queryNorm
0.23214069 = fieldWeight in 2703, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2703)
0.33333334 = coord(1/3)
- Abstract
- Describes a WWW based system which allows users to view, search and post geographically indexed information of the Earth. 2 geographic browsers have been developed: a 2D map browser capable of continuous scroll and zoom of an arbitrarily large sheet and a 3D flight-simulator browser capable of continuous flight around the Earth. On the server side, a geographical and geometrical server has been developed which contains large databases of images, elevations, lines, points and polygons stored in tiles structured into hierarchical pyramids or quadtrees. A metadata server has also been developed which contains URL pointers and geographical coordinates of various WWW documents, geographical information and geometrical models
- Date
- 1. 8.1996 22:08:06
