ISPRS, Vol.34, Part 2W2, “Dynamic and Multi-Dimensional GIS", Bangkok, May 23-25, 2001
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Fig. 6
If we display the circles we draw in the steps of LAA, we have
Fig. 7.
Fig. 7
Fig.8 and Fig.9 show the process of BLAA, the circles in Fig.8
are drawn when we are searching for the object in the road layer
which is nearest to the vehicle point. Whereas the circles in Fig.9
are drawn when we get the temporary table and do the
correcting in the temporary table.
4. CONCLUSIONS
LAA can correct the warps accurately and can simulate the real
vehicle point to the largest extent. The algorithm can also deal
with some special circumstances such as crossroads.
But, from the scheme of LAA, we know that to correct one point
we must query at least 3 tables many times, if the tables are very
large, it will take much time to query a table, it is obviously not
suitable for a real time condition.
Fig. 8
Fig. 9
And also, there are many special points that are not discussed in
this paper, LAA can’t deal with those conditions. But we will
confront them in real work. To solve these problems, further
research is expected.
5. REFERENCES
MapBasic Professional Reference, 3 rd Edition October, 1996
MapBasic User’s Guide, 3 rd Edition October, 1996
Maplnfo Professional^.5) Reference
Maplnfo Professional^.5) User’s Guide
