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(Stranger )
06/05/07 11:47 AM
Re: Scale and Resolution [re: DataDog]Report this article as Inappropriate to us !!!Login to Reply

The National Standard for Spatial Data Accuracy ( defines the data accuracy. In your case, the statement would be that 95% of measured points are withing 20 meters of their true position. For printed maps, the National Map Accuracy Standard is used ( A 1:50,000 map can show data good to about 25.4 meters, or data appears within 25.4 meters of its true position (1/50 inch). By calculating backwords, the scale threshold for data with 20 meter accuracy would be about 1:39,370. Use of the data on larger scale maps would imply greater accuracy than supported by the data.

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*Scale and Resolution DataDog   06/04/07 10:24 AM
.*Re: Scale and Resolution cplank   06/05/07 11:47 AM
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