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Figure 1.  GPS benchmarks (23,115 points) used as GDEM v3 validation reference data.
Table 1.  Error statistics (meters) from accuracy assessments vs. NGS GPS benchmarks.
Figure 6 shows one of the ten sample tiles used for an initial evaluation of the water body delineation in GDEM v3
Figure 7.  Increasing GDEM v3 mean error with increasing density of developed land cover

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