2. Intro.wmv

6. CaveMaps.org • 300+ Entrances on Google Maps • 70+ Cave Outlines on Google Maps • 500+ Full resolution surveys • 1200+ Surveys catalogued & thumb-nailed • 120 Visits per week • No. 1 Google Hit for ‘Cave Maps’ Work in progress ...

8. Contributing Clubs • CPC • RRCPC • BPC • NCC • LUSS • YSS • ULSA • Black Sheep Diggers • KCC • NPC

9. Google Earth Overlay

10. Scanning Old Cave Surveys

13. Scan at the highest resolution • E.g. 300 DPI Greyscale

20. Don’t Save as JPEG

22. Preserve Anti-aliasing

24. How to restore Anti-aliasing • Scan at high DPI • Clean up the image • Resample to reduce image size

25. Transparent Backgrounds

27. 1st Attempt: Magic Wand

31. 2nd Attempt: Colour Replacement

33. 3rd Attempt: Colour to Alpha

37. Google Earth Overlays

38. Double Entrance.avi Double Entrance (part 2).avi Videos\Single Entrance.wmv

41. Google Map Tiles

42. Zoom 1 Zoom 0 256 pixels

43. Zoom 2 (16 tiles) Zoom 1 (4 tiles)

44. 2621 Terabytes

45. Zoom 21 Street View Zoom 19

49. Photoshop