DIY Cartography

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    17-Jul-2015
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Transcript of DIY Cartography

  • DIY CartographyTudor Pavel

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  • What you needA poorly made drawing of a parking

    GIMP Image Editor

    A little patience (Twelve-step program*)

    * http://en.wikipedia.org/wiki/Twelve-step_program

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    http://en.wikipedia.org/wiki/Twelve-step_program
  • The poorly made drawing ofPiata Marasti parking

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  • To overlay the image on themap, you need:

    The image (doh!), but parking rotated withNorth up

    Its width (in mm)

    Its height (in mm)

    Its scale (1:x)

    Coordinates of image center (LatLng)4 / 31

  • Step 1: Screenshot Google Maps

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  • Step 2-1: Select measure tool

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  • Step 2-2: Measure angle (65)

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  • Step 3: Import drawing

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  • Step 4-1: Select rotate tool

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  • Step 4-2: Rotate drawing

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  • Step 5-1: Use scale tool

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  • Step 5-2: And move tool

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  • Step 5-3: Scale and Move

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  • Step 6: Guides for Image Center

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  • Step 7: Get Image Centercoordinates

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  • Shopping list updateThe image (doh!), but parking rotated withNorth up

    Its width (in mm)

    Its height (in mm)

    Its scale (1:x)

    Coordinates of image center (LatLng) ->(46.776649, 23.611951)

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  • Step 8-1: Use fuzzy select tool

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  • Step 8-2: Select unnecessarywhiteness

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  • Step 8-3: And clean it up

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  • Step 8-4: Export it

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  • Shopping list updateThe image (doh!), but parking rotated withNorth up

    Its width (in mm)

    Its height (in mm)

    Its scale (1:x)

    Coordinates of image center (LatLng) ->(46.776649, 23.611951)

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  • Step 9-1: Go to scale image

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  • Step 9-2: Change to mm to getwidth+height

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  • Shopping list updateThe image (doh!), but parking rotated withNorth up

    Its width (in mm) -> 263 mm

    Its height (in mm) -> 228 mm

    Its scale (1:x)

    Coordinates of image center (LatLng) ->(46.776649, 23.611951)

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  • Step 10-1: Measure wall in image

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  • Step 10-2: Measure wall in real lifewith coordinates of the building

    corners

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  • Calculate image scale44790(mm) / 149(mm) = 300.6

    =~ 1:300

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  • Shopping list doneThe image (doh!), but parking rotated withNorth up

    Its width (in mm) -> 263 mm

    Its height (in mm) -> 228 mm

    Its scale (1:x) -> 300

    Coordinates of image center (LatLng) ->(46.776649, 23.611951)

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  • Step 11: Upload

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  • Step 12: Cigar

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