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Published byFelix Cox Modified over 9 years ago
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Intro.wmv
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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...
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Contributing Clubs CPC RRCPC BPC NCC LUSS YSS ULSA Black Sheep Diggers KCC NPC
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Google Earth Overlay
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Scanning Old Cave Surveys
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E.g. 300 DPI Greyscale Scan at the highest resolution
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Don’t Save as JPEG
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Preserve Anti-aliasing
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How to restore Anti-aliasing Scan at high DPI Clean up the image Resample to reduce image size
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Transparent Backgrounds
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1 st Attempt: Magic Wand
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2 nd Attempt: Colour Replacement
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3 rd Attempt: Colour to Alpha
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Google Earth Overlays
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Double Entrance.avi Double Entrance (part 2).avi Videos\Single Entrance.wmv
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Google Map Tiles
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Zoom 0Zoom 1 256 pixels
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Zoom 1 (4 tiles)Zoom 2 (16 tiles)
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2621 Terabytes
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Zoom 19Zoom 21Street View
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Photoshop
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Kml2Tiles.exe
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Input: KML
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Output: Map Tiles
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DeepZoom
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Ease Gill Galegarth The West Kingsdale System DeepZoom Examples
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Microsoft ICE
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iPhone DeepZoom Viewer
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CaveMaps.org/bing
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Offline Mobile Cave Overlays Video
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Is Google Maps more accurate than GPS?
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Google Maps – Errors due to Elevation
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Blackpool Tower 150m: Error 26m Ingleborough 723m: Error 125m?
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Google Maps – Changes over Time
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2000 - 2010
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Google v Microsoft GoogleMicrosoft 4m Difference
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GPS Accuracy: +/- 10m Google Maps Accuracy: +/- 10m ? Conclusion
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