Concept
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- Preferred Labelskos:prefLabel
MD128
- URI
- https://standards.isotc211.org/19157/-3/1/dqc/content/measureDescription/MD128 ↗Go to the persistent identifier link
- Within Vocab
- ISO19157-3 quality measures
| Definitionskos:definition | For a number of points (N), the measured positions are given as xmi, ymi and zmi coordinates depending on the dimension in which the position of the point is measured. A corresponding coordinates xti, yti and zti are considered to represent true positions. A criterion for the establishing of correspondence should also be stated (e.g. allowing for correspondence to the closest position, correspondence on vertices or along lines). The criterion/criteria for finding the corresponding points shall be reported with the data quality evaluation result. |
|---|---|
| has broaderbroader | 128 - bias of positions (1D, 2D and 3D) Bias of the positions for a set of positions where the positional uncertainties are defined as the deviation between a measured position and what is accepted as the corresponding true position. |
| has narrowernarrower | FT128_1 <math xmlns="http://www.w3.org/1998/Math/MathML"><msub> <mi>e</mi> <mrow> <mi>x</mi> <mi>i</mi> </mrow> </msub> <mo>=</mo> <msub> <mi>x</mi> <mrow> <mi>m</mi> <mi>i</mi> </mrow> </msub> <mo>-</mo> <ms… |
| FT128_2 <math xmlns="http://www.w3.org/1998/Math/MathML"><msub> <mi>a</mi> <mi>x</mi> </msub> <mo>=</mo> <mfrac> <munder> <mo>∑</mo> <msub> <mi>e</mi> <mrow> <mi>x</mi> <mi>i</mi> </mrow> </msub> </munder> <m… | |
| https://standards.isotc211.org/19157/-3/1/dqc/content/formulaType/FT128 | |
| notationnotation | MD128 |
| Formulaformula | FT128_1 |
| FT128_2 |