Demo. Check if coordinates fit within
Massasoit National Wildlife Refuge territory No GIS Database needed.
(not needed with text-only mode).
(Lat Lon in digital format, separated by a single space)
This is only a basic example.
The coordinates of Massasoit Wildlife Refuge (main parcel) contour
In reality, one should be able to select the area in question from a list
or else enter coordinates on one's own (as of today, your entries are not verified).
Another limitation of this demo: though you may check coordinates as many times as you wish,
you can create a map only once. Reload the page for a new map.
Note that the order "latitude, then longitude" in the entry box differs from that in
fits with WKT ('Well-Known Text') standard better and simplifies coding. See page source for more detail.