An appraiser consults a geographic information system for parcel boundaries. What limitation applies?
Correct Answer
A) Mapping layers are not a survey of the boundaries
Why this is correct: GIS parcel layers are used for planning, tax, and mapping purposes and contain positional error. They are useful for orientation and rough area estimates, but they are not a survey of the boundaries. The legal description in the deed governs boundary matters. Therefore A is correct. Why the other choices are wrong: B, that such systems may not be cited in an appraisal report, is false; GIS may be cited as a source, but it must not be treated as a survey. C, that mapping data is always more accurate than a deed, is false; the legal description is the authoritative source. D, that boundaries shown are certified by the county surveyor, is false; GIS parcel layers are generally not certified surveys. If a discrepancy appears, the appraiser should disclose it and rely on the legal description. Exam tip: GIS is a tool for orientation, not a substitute for a survey. When a boundary matters, the legal description controls.
Why This Is the Correct Answer
Why this is correct: GIS parcel layers are used for planning, tax, and mapping purposes and contain positional error. They are useful for orientation and rough area estimates, but they are not a survey of the boundaries. The legal description in the deed governs boundary matters. Therefore A is correct. Why the other choices are wrong: B, that such systems may not be cited in an appraisal report, is false; GIS may be cited as a source, but it must not be treated as a survey. C, that mapping data is always more accurate than a deed, is false; the legal description is the authoritative source. D, that boundaries shown are certified by the county surveyor, is false; GIS parcel layers are generally not certified surveys. If a discrepancy appears, the appraiser should disclose it and rely on the legal description. Exam tip: GIS is a tool for orientation, not a substitute for a survey. When a boundary matters, the legal description controls.
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