1. babs’ ladder graph

2. Adding to babs’ ladder graph 2.4K 1M 1M National Atlas 5K 25K

3. AutoCarto 2008 Poor readability with scale change Project description Solve these problems together: Poor readability with resolution change:

4. AutoCarto 2008 –overall goal is to create and evaluate new TNM designs that perform well through both resolution and scale. –preliminary result: use symbols/labels from smaller- scale high-resolution maps for larger-scale coarse-resolution media –minimize the number of symbol combinations that serve users’ varied media resolutions and scales –coherence in look of maps at all scales allows users to interpret all maps presented within viewers they use and from their printers Summary

5. AutoCarto 2008 Hypothetical results 24 60 100 140180210230 250 270290K Design Scale > 600 ppi Onscreen Viewing Print Product Map Scale Users’ Scale < 132 ppi 8?50?210? Discover…Use the 24K print design for 8K online viewing

6. AutoCarto 2008 Use of hypothetical results 24 60 100 140180210230 250 270290K Design Scale > 600 ppi Onscreen Viewing Print Product Map Scale Users’ Scale < 132 ppi 8?50?210?100? 170? Then extrapolate…Use the 170K print design for 100K online viewing

7. AutoCarto 2008 Sample areas (in GIS): Pomme de Terre (MO) 5 inches square at 1:24K 12 3

8. AutoCarto 2008 Enlargement needed: 8K ArcMap at 81 ppi (Pomme de Terre, MO, Site 2)

9. AutoCarto 2008 Enlargement needed: 11K PDF at 132 ppi

10. AutoCarto 2008 Summary data for nine sites Preliminary Results 681012141618202224K 15K Design Scale >600 ppi 13K9K8K Onscreen Viewing Print Product Map Scale ArcMap PDF Median fully readable scale 132 ppi81 ppi ArcMap PDF

11. Adding to babs’ ladder graph 2.4K 1M 1M National Atlas 5K 25K