What practical limitation can make aerial imagery alone insufficient to establish material site characteristics for an appraisal?
Correct Answer
D) Grade, drainage and access are hard to judge remotely
Aerial imagery may not establish grade, drainage, usable access or other ground-level conditions with adequate reliability. Obtain information sufficient for the assignment, which can require inspection or qualified additional sources. There is no universal rule in this question that every appraisal requires the same inspection.
Why This Is the Correct Answer
Option D is correct because grade, drainage and usable access are ground-level conditions that aerial imagery may not reveal with adequate reliability. When they are material, the appraiser needs inspection or other qualified sources to obtain sufficient information.
Why the Other Options Are Wrong
Option A: Imagery is prohibited as a source of site data
Option A claims imagery is prohibited as a source of site data. Aerial imagery is a widely used and accepted data source; the issue is whether it alone is sufficient, not whether it is allowed.
Option B: Inspection is required by statute in each state
Option B claims inspection is required by statute in each state. There is no uniform state-by-state statute requiring the same inspection for every appraisal; the inspection needed depends on the scope of work for the assignment. In any case, a legal mandate is not a practical limitation of the imagery itself, which is what the question asks about.
Option C: Aerial images cannot show the parcel's boundaries
Option C claims aerial images cannot show parcel boundaries. Imagery is often viewed with parcel map overlays that approximate boundaries; the bigger limitation is judging ground conditions like grade and drainage.
Sky shows shape, not slope
From above you see outlines, but slope, wetness and real access often need a ground view.
How to use: Use this when judging whether a remote data source is enough for site characteristics.
Exam Tip
Be wary of answers claiming a universal prohibition or statutory requirement; prefer answers about whether the data are sufficient for the assignment.
Common Mistakes to Avoid
- -Assuming aerial imagery cannot be used at all
- -Believing one uniform inspection rule applies to every appraisal
- -Relying on imagery alone for grade and drainage
Concept Deep Dive
Analysis
This question tests the practical limits of remote data sources in site analysis. Aerial imagery is useful, but it may not reliably show ground-level conditions such as grade, drainage and usable access, which can be material to value.
Background Knowledge
Site analysis covers physical characteristics such as size, shape, topography, soil, drainage and access. The appraiser must gather information sufficient to produce credible results for the intended use. Remote sources can be supplemented by inspection, surveys, engineering reports or other reliable data.
Real-World Application
An appraiser reviewing a rural parcel on aerial imagery sees a clear driveway, but a site visit shows the drive crosses a wet, low-lying area that floods seasonally. That drainage issue materially affects use and value.
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Previous Question
A comparable vacant site sold for a cash-equivalent $305,000. The subject is superior to the comparable in location, which calls for a +$12,000 adjustment, and inferior in topography, which calls for a −$7,000 adjustment. No other adjustments apply. What land value does sales comparison indicate?
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What is the purpose of a site analysis within an appraisal?