Setting Scale on Imported Scanned Maps

I'm trying to convert a hand draw map into a nice CC3 overland map. I haven't had any difficulties importing the bitmap onto a separate layer and tracing out the various landmasses, seas, etc. That's going great. My issue is "scale" and the "scale bar". :)

Original map:
The original scanned map has a scale bar with X distance = 300 miles. Using a ruler, I estimated that I needed roughly an overland map roughly 1200 miles X 1200 miles. I created such a map, added my BITMAP layer and sheet and imported my image. The original map was actually wider than it was tall, but I didn't really need the extra stuff on the right edge. So, after I imported my scanned image, I scaled it up (proportionately) so that it filled the height of the CC3 map and stuck out past the right edge. If I use the distance tool and measure the length of the "scale bar" on the imported bitmap it says that the "300 mile scale bar" is 329.447 miles in CC3.

Great. Now I want to produce a CC3 Scale Bar that is accurate. Should I set the scale of the scale bar when I drop it onto my map? If so, what ratio should I use? The map is set to a default ratio of 1.2 for both X and Y.

Any advice would be greatly appreciated.

-Veghead

Comments

  • MonsenMonsen Administrator 🖼️ 81 images Cartographer
    When working with scale, you REALLY want to work with one map unit equals 1 mile. So instead of stretching your imported bitmap to fit the border, you should scale it so that the scale bar in the drawing is exactly 300 miles, this will make your life much easier as you progress.

    To do this, right click the scale button, and choose non-visual scale. Select the bitmap, and execute the command with Do it. When acsked for the scale factor, type in 300/329.477 (then hit enter). For scale center, anywhere is usually fine, but the best sposts are usually eiter the origin (0,0), or the center of the map.

    Note that if you have already done tracing, as you indicate, you can select your landmasses and other entities the same time you select your bitmap to scale everything at once, keeping it aligned.

    Then draw a new map border that will fit the size of your now correctly-scaled map.
  • I am always amazed and impressed by you CC knowledge. Your forum answers should be compiled into a book :-)
  • Posted By: illuminatispyI am always amazed and impressed by you CC knowledge. Your forum answers should be compiled into a book :-)
    They were =). Tome of Ultimate Mapping =)
  • 6 days later
  • Posted By: MonsenWhen working with scale, you REALLY want to work with one map unit equals 1 mile. So instead of stretching your imported bitmap to fit the border, you should scale it so that the scale bar in the drawing is exactly 300 miles, this will make your life much easier as you progress.

    To do this, right click the scale button, and choose non-visual scale. Select the bitmap, and execute the command with Do it. When asked for the scale factor, type in 300/329.477 (then hit enter). For scale center, anywhere is usually fine, but the best spots are usually either the origin (0,0), or the center of the map.
    Uhhh... dumb question. What does the scale button look like? I can't seem to find it... :)

    Thanks!

    -Sean
  • DogtagDogtag Moderator, Betatester Traveler
    edited September 2013
    It looks like this image. You might also know it, or think of it, as the "Re-size" button (I did). It's usually on the left-hand side, grouped together with the Move, Scale, Rotate button, the Copy button, and the Rotate button.

    Come to think of it, I've also always called the "Move, Scale, Rotate" button simply the "Move" button. Go figure.

    Cheers,
    ~Dogtag
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