Resolution, Scale & DPI

Discussion in 'Mac Basics and Help' started by swanny, Oct 14, 2006.

  1. swanny macrumors regular

    swanny

    Joined:
    Nov 12, 2004
    Location:
    Alberta
    #1
    Resolution, Scale & dpi

    Oct 14, 2006
    Earth
    Saturday
    Morning
    Sunny
    Cool

    Map image @ 72 dpi, size = 612 x 720 pixels or 8.5 x 10 inches
    @ screen resolution of 800 x 600, 15 inch monitor,
    Scale : 1 inch = 800 feet

    In a fruitless attempt at a standard for the world of the web, I have created a "true scaled map" of my region. If your screen is set to the proper resolution (800 x 600), the map viewed will appear at the approx. size and quality of the file. It, the image, will print out at true scale too.

    Go = http://www.cabis.org/redmap.htm

    Now if we could get a "color" standard?


    Actually this was rather difficult to determine because
    the scale of all my source maps was out of wack and didn't configure
    to the screen resolution or the dpi or dots per inch.
    I ended up actually having to "walk" or pace out some of the distances to get a true sense of things.
    There were then needless to say "many" variables.
    Even at that it's still a fair ways "out" but it is a start.
    The map itself is an overlay of a satellite map and a city map
    with small photo images taken from various points and some artistry thrown in.
    It thus is a rather "composite" true scaled map of my approximate location.

    humbly yours

    sir
     
  2. GimmeSlack12 macrumors 603

    GimmeSlack12

    Joined:
    Apr 29, 2005
    Location:
    San Francisco
    #2
    Wait... so what did you do? You drew a map by walking around your city? Or you just copied the layout from a satellite photo. I am failing to see the significance of what you have done here.

    Doesn't Google Earth/Maps already accomplish this?
     
  3. swanny thread starter macrumors regular

    swanny

    Joined:
    Nov 12, 2004
    Location:
    Alberta
    #3
    Well you would think that it has been done, but I couldn't find a "standard" on the web,
    I tryed to use google earth but somehow the "scale" was quite off, so in order to get what you get on the screen to be to scale with whats printed, or to a real ruler and to real earth, I created this.
    What I put up, is to scale on screen, map, print and "reality", so three or four aspects if you will, if your screen resolution is 800 x 600 so if you grab a ruler and measure the image on your computer screen at that res. 1 inch on the map and on your screen is equal to 800 feet on the map and in the "real" world.
    You see "actual" scale (scale to a real ruler) is dependant upon screen resolution, something thus is only "to scale" at a certain resolution, change the resolution, you screw up the actual scale. So to double check if its to scale the resolution has to be indicated and grab a simple school ruler.

    thats all...

    sir
     
  4. GimmeSlack12 macrumors 603

    GimmeSlack12

    Joined:
    Apr 29, 2005
    Location:
    San Francisco
    #4
    Oh.

    You could also use the ruler in whatever program you're drawing in. But I do see your point.
     
  5. swanny thread starter macrumors regular

    swanny

    Joined:
    Nov 12, 2004
    Location:
    Alberta
    #5
    Well thanks I appreciate that.
    I just double checked the google maps site
    and the scale they have seems to be set to work
    with your screen and a ruler best at 800 x 600 resolution.
    I tried other resolutions and they don't seem to add up
    with the screen measure.
    I checked to see but their was no mention of what
    resolution to use in the "terms of use" and I suppose
    its just assumed thus that 800 x 600 is the internet standard
    resolution, but the programs scale is dynamic
    because the maps are zoomable and
    that quite a programing feat so on that score they
    have to be congradulated.

    sir
     

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