Missouri Spatial Data Information Service presentations (MU)
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This collection contains presentations on a range of subjects relating to the work of MSDIS. The subjects range from GIS educational sessions to database management and have been presented by our program director, Tim Haithcoat, to a variety of audiences.
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Item Navigating INFO: Advanced Processing(Missouri Spatial Data Information Service, 1999) Haithcoat, TimThis presentation deals with data structures and algorithms not inherent to ARC. It is mostly concerned with line coverages (AATs). Topics include: node-arc lists (NAL), NODE Valence tables (VAL), dangling and orphan ARCs, travel time to a node (ALLOCATE), polygon neighbor list, and backwalking a least-cost path.Item Navigating INFO: Additional Concepts(Missouri Spatial Data Information Service, 1999) Haithcoat, TimThis presentation looks at some aspects of INFO not covered by previous presentations. They include creating and using arrays, cross-tabulation, redefined keys, alternate directories, displaying text with INFO, purging from large files, loading and unloading data, overdefined items, and other techniques.Item Navigating INFO: Using INFO with AML(Missouri Spatial Data Information Service, 1999) Haithcoat, TimAML is a type of variable substitution, with AML variables set as arguments or by directives. A stored value is substituted for variable name. Variable values are substituted and embedded into the INFO program code. Variables are passed to INFO through the CALC command, the MOVE command, or as a response to ACCEPT or other prompt. AML checks to see if files or programs exist, and the sets a variable to .TRUE. Or .FALSE. It is used to decide what to do in INFO. Comment Lines are passed to INFO as blank lines. AML uses REM inside INFO data blocks, and document lines intentionally left blankItem Navigating INFO: Programming(Missouri Spatial Data Information Service, 1999) Haithcoat, TimThis presentation looks at various programming aspects of INFO, including odd and even program sections, compiling and decoding, debugging techniques, editing, running programs with LINK, and menu files and programs.Item Navigating INFO: Database Hygiene(Missouri Spatial Data Information Service, 1999) Haithcoat, TimDatabase hygiene is the process of creating and maintaining an efficient relational database, as well as modifying existing databases that were poorly defined or implemented. Subtopics offered in this presentation include bits and bytes and item definitions, normalization, the ARC RELATE command, restructuring tricks such as projecting files, and minimal output overlays.