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- W2075878710 abstract "It is increasingly important to deal with updated geographic databases in order to ascertain any spatial analysis for decision making in urban planning. However, if updating a conventional database (e.g., changing the delivery address in a custom file) can be done by means of a SQL-type language or via a form interface, in the domain of geographic databases, updating means different things and cannot be performed easily. The essential reason is because updating information is not only elementary, but rather coming from different sources such as newly made measures, aerial photos, scanned maps, and so on. Indeed, in this case, updating or multisource integration can mean: • local cartographic updates — that is to say, to integrate newly made measures into a database storing old measures: in this case, sometimes some points or some segments must move a little bit, possibly replacing segments by piece-wise lines and so on, possibly by means of elastic transformations; • global updates — for instance, using aerial photos in order not only to detect clandestine buildings but also to automatically shift all points of the database; this can be done by defining control points; • extension of the coverage — in other words, when we have to fuse maps of two neighbouring zones whose boundaries do not meet, it is necessary to select control points and to perform rubber-sheeting at the vicinity of the boundary based on those control points; • updating for measurement or topological error correction — that is, reconstruction of badly structured databases based essentially on topologic information; this can be achieved on a single layer (e.g., transformation of a spaghetti-like cadaster into a real parcel-oriented cadaster, closure of polygons) or on multiple layers (e.g., to ensure that a building is not astride the neighbouring parcels). In this paper, we will give an overview of problems to be solved together with some solutions in order to perform such different kinds of updating." @default.
- W2075878710 created "2016-06-24" @default.
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- W2075878710 date "1994-07-01" @default.
- W2075878710 modified "2023-10-14" @default.
- W2075878710 title "Multi-source updating and fusion of geographic databases" @default.
- W2075878710 cites W1498880722 @default.
- W2075878710 doi "https://doi.org/10.1016/0198-9715(94)90027-2" @default.
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