Multiscale Hypsometric Mapping - Advances in Cartography and GIScience - page 511

2.4 Multiscale mapping and visualization

2.4.1 Layers structure and scale ranges

One general thing to be made when designing any multiscale map is to de-
fine logical structure of the layers and their limits of applicability (scale
ranges). These questions are deeply considered by Cecconi et al. (2004)
and Brewer and Buttenfield (2009). For clear structure layers can be united
in thematic and scale groups. What should be the highest level of group-
ing: scale or theme? We find that in case of scale series with 2-2.5-times
difference scale grouping on top level is more suitable. The scale ranges
can be set to allow scale decrease in 1.5 times for 2-times interval and in
1.75 times for 2.5-times interval between neighboring scales ( T able 2 ).

Database
LoD

*k ↑

Scale Group Scale range ↓

1 1:25 000 … — 1:37 500 1,5 —

2 1:50 000 1:37 501 — 1:75 000 1,5 0,25

3 1:100 000 1:75 001 — 1:150 000 1,5 0,25

4 1:200 000 1:150 001 — 1:350 000 1,75 0,25

5 1:500 000 1:350 001 — 1:750 000 1,5 0,3

6 1:1 000 000 1:750 001 — 1:1 750 000 1,75 0,25

7 1:2 500 000 1:1 750 000 — 1:3 750 000 1,5 0,3

8 1:5 000 000 1:3 750 001 — 1:7 500 000 1,5 0,25

9 1:10 000 000 1:7 500 001 — 1:17 500 000 1,5 0,25

10 1:20 000 000 1:17 500 001 — 1:35 000 000 1,75 0,25

11 1:50 000 000 1:35 000 001 — … — 0,3

* k ↑ — zoom out ratio, k ↓ — zoom in ratio

Table 2: Scale ranges (limits of applicability)

These rules prevent LoD to be decreased 2 times (keep in mind that relief
is sensible for scale reduction) and allow some zooming in without change
of detailization for examining areas of complex relief representation.