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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
Spatial Allocation
  • Philosophy
  • Tools
  • Design
  • Standard reports
  • Questions
spatial allocation philosophy
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
spatial allocation tools
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
spatial allocation standard reports
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
spatial allocation questions
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)
spatial allocation questions continued
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
spatial allocation questions continued1
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)