How to Save a Very Large Map to a Single Image File from Google Maps

Have you ever wanted to have a large map from Google maps, of the whole area, and also include all the details, all in one image?

Here is my method:

  • Go to Google Maps
  • Find the city you want a map for
  • Select the zoom level you want to keep your entire map at, be sure you can easily read the smaller streets you want to have on your map
  • After you have a good zoom, click on “Link” in the upper right corner
  • Select all of the text in the second box under “Paste HTML to embed in website”
  • Right-click and select “copy”
  • Open up Windows Notepad by going to:
    • Start Menu>All Programs>Accessories>Notepad (Not Wordpad)
  • Paste the text into Notepad
  • Where it reads “<iframe width=”425″ height=”350”, Use a calculator to multiply each number by a number, maybe about 25, so “425” you would change to “10625”, because 425 x 25 = 10625, and “350” would change to “8750”
  • Click “save” and name the file “My map.html”, and click “save”
  • Close Notepad, and drag “My map.html” into your browser window,
  • Select the URL from the browser address bar, it should look something like this:
    • file:///C:/Documents and Settings/username/Desktop/my map.html
  • Open Adobe Acrobat Professional
  • Click on “File>Create PDF…>From Web Page…
  • Paste the URL you copied into the address bar line, it should look something like this:
    • file:///C:/Documents%20and%20Settings/username/Desktop/my%20map.html
  • Click the “Settings…” button
  • On the “General” tab, make sure the file type is “HTML”
  • Click the “settings…” button
  • Where it reads “other settings” and “multimedia content”, be sure it says, “Embed Multimedia Content when Possible”
  • Check the “Convert Images” box
  • And “Retain Page Background”
  • Click “ok”
  • On the “Page Layout” tab, on the size area, change width and height to a much bigger size, its probably 96 DPI, so 10625 / 96 = 111 inches wide, and 8750 / 96 = 92 inches high, because Inches = Pixels / DPI, so change your height to 92 inches, and your width to 111 inches
  • In the “scaling” section, unselect, “Scale wide contents to fit page”
  • Click “OK”, then click on “Create”
  • When its finished, save it as a PDF
  • Close Adobe Acrobat
  • Open Adobe Photoshop
  • Drag the PDF to the Photoshop stage
  • Crop the image to remove any blank space, and to the area of the map you want to keep
  • Click on “Image”, then click on “Image Size”
  • On the bottom, click on “Constrain Proportions”
  • Select “Bicubic Sharpener (Best for Reduction)” from the drop-down menu
  • In the width, be sure to make the file LESS THAN 30000 pixels, Photoshop cannot save any JPEG image over 30000 pixels, so change it to 29000, this way you can gather a very large size map, 50000 pixels or more, then reduce them to 29900 or less, keeping all of the larger maps details
  • Save it as a JPEG file, check the file size of the output file
  • If you want a smaller file size, you can adjust the size again, and also the image quality when saving, generally, maybe 8000 to 12000 pixels is ok, with 8 to 12 JPEG image quality when saving
  • You can also try leaving the image in a 8.5 x 11 inch PDF file in Acrobat, selecting “Scale wide contents to fit page”, and then using only the PDF as a map itself, without Jpeg. Acrobat will not export a Jpeg of 30000 pizels or more, if its smaller than 30000, maybe you can just export it from acrobat, without using photoshop
  • Both formats are also ok for mobile phones which can handle PDF’s and JPG’s of this size

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