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Map digitization is an important source of spatial data, and its process of production is complicated, the error generated by each step will influence the outcome of data quality. First, from perspective datasource, hardware, software and personnel factors related to map digitizing, the paper discussed the uncertainty; After that, an uniform spatial data quality model is built. Then starting from...
Metadata is an important document of image about outcome, which reflects history and status of the results. One of the factors affecting the quality of image data is quality of metadata, and quality of metadata is a decisive factor whether the user adopts dataset. Therefore, quality of metadata must be controlled; and metadata will introduce a random uncertainty in the process of entrying, editing,...
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