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Spatial Allocation

Spatial Allocation. Philosophy Tools Design Standard reports Questions. Spatial Allocation (Philosophy). Design for only the necessary functions Perform a computational intersection of point, arc, or polygon structures within a polygon structure

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Spatial Allocation

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  1. Spatial Allocation • Philosophy • Tools • Design • Standard reports • Questions

  2. Spatial Allocation (Philosophy) • Design for only the necessary functions • Perform a computational intersection of point, arc, or polygon structures within a polygon structure • Create arbitrary emissions modeling grid structures • Manage and display underlying maps and spatial attributes • Covert among various, common map projections. • Use off-the-shelf shareware/freeware tools • Do not reinvent • Provide hooks for future enhancements • Scope creep will kill this aspect of the project • Bottom-line: take the minimalist approach

  3. Spatial Allocation (Tools) • PostgreSQL -- www.postgresql.org • GNU make – mirrors.usc.edu/pub/gnu/make/ • GNU readline – mirrors.usc.edu/pub/gnu/readline/ • Ant – ant.apache.org/srcdownload.cgi • JAVA – java.sun.com/j2se/ • Perl – www.perl.com/pub/a/language/info/software.html#sourcecode • PostGIS -- postgis.refractions.net • shp2pgsql – ARC shape files to SQL insert constructs • e00ps – ARC export files to SQL insert constructs – e00pg.sourceforge.net • special converters to import BELD3 data will be constructed • MIMS Spatial Allocator -- www.epa.gov/asmdnerl/mims/software/spatial_allocator.html • Java-enabled Unified Mapping Platform (JUMP) -- www.vividsolutions.com/jump • PostGIS JUMP driver – postgis.refractions.net/download.php

  4. Spatial Allocation (Design)

  5. Spatial Allocation (JUMP)

  6. Spatial Allocation (Standard Reports) • Map of domain with grid structure overlay • Maps of individual coverages in native and projected coordinates • Gridded maps of BELD3 by species • Gridded maps of individual surrogate fractions • Gridded map of point source locations

  7. Spatial Allocation (Questions) • ARC shape and export files • Shape converter is stable • Export converter may not be so stable (ESRI considers the export format to be proprietary; hence, the converter is based on a reverse engineering approach – the web gossip seems to indicate that it works fine) • Datum in conjunction with non-datum coverages – very difficult to implement (i.e., easiest to use either all datum-based coverages or nondatum-based coverages) • MIMS Spatial Allocator • No need for special C-compiler (GNU C or host C should work fine) • No special license requirements • Noted problems with memory leaks; problems with large (<200 MB) coverages • Special map projections • Standard map projections definitely supported (Lambert Conformal, UTM, geographic, Polar Stereographic) • Special map projections not supported (stateplane [these are specialized projections of standard map projections] e.g. Lambert, transverse, oblique mercator)

  8. Spatial Allocation (Questions – continued) • Geographic Resources Analysis Support System (GRASS) • grass.itc.it • Relatively large overhead (150 MB) • Robust GIS • Use will require new coding to build MIMS functionality • Other shareware/freeware GIS tools • PostGIS itself provides basic GIS functionality • Geometry Engine - Open Source (GEOS) – geos.refractions.net/ • Java Topology Suite (JTS) – www.vividsolutions.com/jts/jtshome.htm • Will need to be coupled to map projection system like Cartographic Projections Library PROJ.4 (www.remotesensing.org/proj/) • These systems provide basic GIS functionality but will require coding to recreate MIMS Spatial Allocator functionality

  9. Spatial Allocation (Questions – continued) • What if any special processing needs to be considered for identifying data associated to tribal lands when the base data (e.g., BELD3) has no such information? • Any such pre- or in-line-processing of the data and the ability of the project team to incorporate such a capability in OPEM has resource implications (i.e., the project team believes that this is an enhancement we can live without at this time)

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