TY - GEN
T1 - Tiling large geographical databases
AU - Goodchild, Michael F.
N1 - Funding Information:
The research on which this paper is based has been supported by the US Geological Survey, Digital Equipment Corporation and the National Science Foundation, Grant SES 88-10917.
Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 1990.
PY - 1990
Y1 - 1990
N2 - Geographical variation is infinitely complex, so the information coded in a spatial database can only approximate reality. The information will always be inadequate, in spatial resolution, thematic or geographical coverage. "Large" can be usefully defined as exceeding our current capacity to deliver. We provide examples of large geographical databases. Traditional stores partition geographical data by theme and geographically. We assume that digital geographical databases will be largely archival, and will be similarly partitioned. A general model of a large archival store is presented. We analyze the properties of a generalized Morton key as a means of indexing tiles, and illustrate its role in traditional systems of tile indexing. For global databases, we propose a tiling based on recursive subdivisions of the triangular faces of an octahedron using a rule of four.
AB - Geographical variation is infinitely complex, so the information coded in a spatial database can only approximate reality. The information will always be inadequate, in spatial resolution, thematic or geographical coverage. "Large" can be usefully defined as exceeding our current capacity to deliver. We provide examples of large geographical databases. Traditional stores partition geographical data by theme and geographically. We assume that digital geographical databases will be largely archival, and will be similarly partitioned. A general model of a large archival store is presented. We analyze the properties of a generalized Morton key as a means of indexing tiles, and illustrate its role in traditional systems of tile indexing. For global databases, we propose a tiling based on recursive subdivisions of the triangular faces of an octahedron using a rule of four.
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U2 - 10.1007/3-540-52208-5_25
DO - 10.1007/3-540-52208-5_25
M3 - Conference contribution
AN - SCOPUS:0007825364
SN - 9783540522089
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 137
EP - 146
BT - Design and Implementation of Large Spatial Databases - 1st Symposium SSD 1989, Proceedings
A2 - Buchmann, Alejandro P.
A2 - Gunther, Oliver
A2 - Smith, Terence R.
A2 - Wang, Yuan-Fang
PB - Springer Verlag
T2 - 1st Symposium on the Design and Implementation of Large Spatial Databases, SSD 1989
Y2 - 17 July 1989 through 18 July 1989
ER -