Image Size and Resolution

These plat map images are 600 pixels wide by around 800 pixels high.

WHY 600 PIXELS WIDE:

This is so that they will print from the web page in regular portrait mode and fill one page. They will also be completely displayed on a 640 x 480 pixel computer monitor without a scroll bar on the bottom. I rounded down to 600 pixels wide, so that makes about 200 pixels per mile (width of a section of land).

SIZE OF IMAGE ON COMPUTER MONITOR:

Regardless of the print size specified for an image, the size of an image on-screen is determined by the pixel dimensions (600 wide) of the plat map image and the monitor size and setting. A large monitor set to 1024 by 768 pixels uses LARGER pixels than a small monitor with the same setting, so they are BOTH 1024 pixels wide. The plat map image is 7" wide on a 12" wide monitor because if 1024 pixels = 12", (600/1024) x 12" = 7". The image is 9" wide on the larger monitor.

PRINTING IMAGE FROM WEB PAGE:

When I print from the WEB PAGE DISPLAY, it comes out 6 1/4" wide for me instead of the 4" you would expect. In most cases, monitor displays are set to 96 ppi, so the original 150 ppi image is stretched to 96 ppi. For a plat map image 600 pixels wide, 600 pixels divided by 96 ppi = 6 1/4". Putting it another way, the 150 pixels that made up an inch are spread out to about an inch and a half.

DOWNLOADING AN IMAGE TO SAVE AS A FILE:

Right-click on an image to bring up a menu. Click on "Save Picture As", and enter a file name for the directory you want. The image size and density will be as originally scanned (150 ppi, and about 4" wide).

PRINTING IMAGE FROM A PHOTO EDITOR:

If you save a plat map image into, and print from, an image editor like Adobe PhotoDeluxe, it prints at the original scanned size (4" wide). This is because they were scanned at 150 pixels per inch (ppi), so their PRINT SIZE is 4" by around 5 1/3". (600/150 = 4", 800/150 = 5.33") A resolution of 150 ppi is good for printing on a 300 dots per inch (dpi) printer.

PHOTO-QUALITY PRINTERS:

Photo quality printers print at 2400 dpi, where scanning resolution should be 400 ppi. If you have a need for an image or two at this resolution, email me at jhartsell@aol.com. I can either email the file, or mail a CD or floppy disk.