Download or read book Proceedings of a Seminar on Variable Grid Resolution - Issues and Requirements, Held on 18-19 August 1977, at the Hydrologic Engineering Center, Davis, California written by HYDROLOGIC ENGINEERING CENTER DAVIS CALIF. and published by . This book was released on 1977 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Creating a geographic information system (GIS) involves the problem of needing more detail in certain parts of the study area and less detail in other parts. This problem may be handled in the classification, encoding or data structure stages of creating a GIS. The seminar participants worked on this problem primarily in terms of data structure such as triangles, polygon overlay to a variable grid and variable grid by a packed run-length data storage scheme.