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This looks like bad multipath effects I have seen - but those are generally seen when capturing features near (within 2 foot of) high reinforced concrete walls. Different environment but the effects look quite suspiciously similar. External antennas are supposed to have better multipath rejection. And you might do better using an offset (preferably ...


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Russell Congalton literally wrote the book on the subject: Assessing the Accuracy of Remotely Sensed Data: Principles and Practices, Second Edition (Mapping Science). I highly recommend reading it. The most common way to assess the accuracy of a categorical land cover map is by using a confusion matrix (aka error matrix). The following shows the layout of a ...


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Chris W is on the mark, especially on the final two points. A hundred block is of limited valuable and a street name without a number at all is only useful if there are just one or two blocks to the street. As he indicated, treat each "class" separately, though the first two likely can be run together depending on the locator style. E.g., a US Streets style ...



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