Joh Johan, kunnen
wij die GIS gegevens
ook mee naar
buiten nemen?
GLOBE
GLOBG
Generalization of Area Partitions (2)
The GAP-tree is a structure which can
store generalizations in such a way that
for every scale the matching generaliza
tion can rapidly be determined. In this
research GAP-trees were built for two
different datasets, the vGBKN and the
ToplOvector. After setting the feature
type priority and compatibility values,
the generalizations were performed au
tomatically. This is of great importance
for efficient use of cartographic data via
the internet. During webbrowsing, a
correct generalization for every map level
is determined and can be shown very
fast. In the previous issue of this magazi
ne the authors discussed the theoretical
backgrounds and the implementation.
In this second and concluding part they
deal with the test results and discuss
possible improvements.
De auteurs
willen graag
Harry Uitermark
en Frank van
Wijngaarden
bedanken voor
hun bijdrage aan
de discussies
tijdens het
onderzoek.
[1] Andrew U. Frank and Renato Barrera, The Field-tree:
A data structure for Geographic Information System.
Symposium on the Design and Implementation of
Large Spatial Databases, Santa Barbara, California,
p. 29-44, Springer-Verlag, Berlin, July 1989.
[2] Hanan Sarnet, The Design and Analysis of Spatial Data
Structures. Addison-Wesley, Reading, Mass., 1989.
[3] Stuart Shea, K. and Robert B. McMaster, Cartographic
generalization in a digital environment: When and how
to generalize. Auto-Carto 9, p. 56-67, April 1989.
[4] Oosterom, Peter van, The Reactive-Tree: A storage
structure for a seamless, scaleless geographic database.
Auto-Carto 10, p. 393-407, March 1991.
[5] Oosterom, Peter van, and Jan van den Bos, An object-
oriented approach to the design of Geographic
Information Systems. Computers Graphics, 13(4):
409-418, 1989.
[6] Putten, Judith van, Experiences with the GAP-tree.
Master's thesis, Utrecht University, Computer Science
Department, INF-SCR-97-30, November 1997.
Meer informatie over
het mobiele GIS
kantoor?
Bekijk de thema's bij
het werkgebied
'Geo-informatie' op
onze website.
www.oranjewoud.nl
GEODESIA
Summary
Literatuur
Coördinaat bepaling van
grondslagpunten in RD
en/of NAP
Coördinaat bepaling van
puntobjecten
Adviesverlening m.b.t. GPS
GPS cursussen
GPS trainingen op maat
Verhuur van GPS
apparatuur
Verwerking van GPS data
Uw GPS partner voor
GPS metingen
Verhuur apparatuur
Opleidingen
Neem vandaag nog contact op
Globe NV
Langestraat 221
B-2240 Zandhoven
België
Tel.: +32 3 466 05 05
Fax.: +32 3 466 05 00
E-mail: info@globe.be
Web www.globe.be
505
www.oranjewoud.nl
