What format, datum and projection do my images need to be, in order to display imagery on my handheld unit?
Since WIMS 3 uses the ArcPad software application, image files must be in one of the acceptable formats for use with ArcPad. ArcPad 7.1 allows files in a variety of formats, including JPEG, MrSID, GIF, TIFF or BMP. We generally prefer to use background imagery that is either JPEG or MrSID, simply because the smaller the file size, the faster it takes for that image to load and rewrite on the handheld unit. WIMS 3 uses imagery in the WGS84 datum and in the UTM or decimal degree projection. NAD83 is essentially the same as WGS84 in much of the U.S., so you can also use images in this datum, provided you are aware of the discrepancy for your area.
