What is the difference between GIS and GPS? A GIS, or Geographic Information System, is a computer system that keeps and uses maps in a digital form. In the case of a cell phone, the location is determined using GPS if your phone has this capability, or by triangulating your location using all the cell towers that can pick up the signal from your phone.ĥ. How does the 911 service know where I am? If you are calling on a land line, the service address of the phone you are calling on is used. What is the difference between oblique photography & aerial/ ortho photography? Oblique photography is taken at an angle, similar to what you might see looking out the window of an airplane, while traditional aerial photography is taken looking straight down while directly over the area being photographed.Ĥ. Parcel addresses are specific to a piece of real estate.ģ. What is the difference between an address point address and a parcel address? Address points represent the general location of a unique address – for example an individual house, apartment, condominium or office. The property lines are certainly not survey accurate and are not intended to represent actual surveyed property lines.Ģ. In areas of concern, these records are checked to re-map areas that appear to be inconsistent. Typically today we rely on deeds and plats of record to map the property lines. Those lines could have been mapped according to fence lines or other various assumed physical representations of where the property lines were thought to exist. In an older, more rural portion of the county, the property lines may not have been surveyed in many years. In a newer subdivision, past 5 years or so, the lines are probably within 5 feet +/- of where they actually exist. In general the newer a subdivision, the more accurate the mapped lines. What is the accuracy of the parcel data? The accuracy of the property lines varies depending on different factors.
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