Potmesil, M.: Maps alive : viewing geospatial information on the WWW (1997)
0.01
0.0076993788 = product of:
0.023098135 = sum of:
0.005354538 = weight(_text_:in in 2703) [ClassicSimilarity], result of:
0.005354538 = score(doc=2703,freq=2.0), product of:
0.059380736 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.043654136 = queryNorm
0.09017298 = fieldWeight in 2703, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.046875 = fieldNorm(doc=2703)
0.017743597 = product of:
0.035487194 = sum of:
0.035487194 = weight(_text_:22 in 2703) [ClassicSimilarity], result of:
0.035487194 = score(doc=2703,freq=2.0), product of:
0.15286934 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.043654136 = 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)
0.5 = coord(1/2)
0.33333334 = coord(2/6)
- 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