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Table of Contents - The Atmospheric Studies Group at TRC

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Section 9: CALPUFF<br />

False Easting and Northing (km) <strong>at</strong> the projection origin<br />

(Used only if PMAP= TTM, LCC, or LAZA)<br />

(FEAST) Default=0.0 ! FEAST = 0.000 !<br />

(FNORTH) Default=0.0 ! FNORTH = 0.000 !<br />

UTM zone (1 to 60)<br />

(Used only if PMAP=UTM)<br />

(IUTMZN) No Default ! IUTMZN = 19 !<br />

Hemisphere for UTM projection<br />

(Used only if PMAP=UTM)<br />

(UTMHEM) Default: N ! UTMHEM = N !<br />

N : Northern hemisphere projection<br />

S : Southern hemisphere projection<br />

<strong>Table</strong> 9-2 (Continued)<br />

Sample CALPUFF Control File (CALPUFF.INP)<br />

Input <strong>Group</strong> 4<br />

L<strong>at</strong>itude and Longitude (decimal degrees) <strong>of</strong> projection origin<br />

(Used only if PMAP= TTM, LCC, PS, EM, or LAZA)<br />

(RLAT0) No Default ! RLAT0 = 0N !<br />

(RLON0) No Default ! RLON0 = 0E !<br />

TTM : RLON0 identifies central (true N/S) meridian <strong>of</strong> projection<br />

RLAT0 selected for convenience<br />

LCC : RLON0 identifies central (true N/S) meridian <strong>of</strong> projection<br />

RLAT0 selected for convenience<br />

PS : RLON0 identifies central (grid N/S) meridian <strong>of</strong> projection<br />

RLAT0 selected for convenience<br />

EM : RLON0 identifies central meridian <strong>of</strong> projection<br />

RLAT0 is REPLACED by 0.0N (Equ<strong>at</strong>or)<br />

LAZA: RLON0 identifies longitude <strong>of</strong> tangent-point <strong>of</strong> mapping plane<br />

RLAT0 identifies l<strong>at</strong>itude <strong>of</strong> tangent-point <strong>of</strong> mapping plane<br />

M<strong>at</strong>ching parallel(s) <strong>of</strong> l<strong>at</strong>itude (decimal degrees) for projection<br />

(Used only if PMAP= LCC or PS)<br />

(XLAT1) No Default ! XLAT1 = 0N !<br />

(XLAT2) No Default ! XLAT2 = 0N !<br />

LCC : Projection cone slices through Earth's surface <strong>at</strong> XLAT1 and XLAT2<br />

PS : Projection plane slices through Earth <strong>at</strong> XLAT1<br />

(XLAT2 is not used)<br />

----------<br />

Note: L<strong>at</strong>itudes and longitudes should be positive, and include a<br />

letter N,S,E, or W indic<strong>at</strong>ing north or south l<strong>at</strong>itude, and<br />

east or west longitude. For example,<br />

35.9 N L<strong>at</strong>itude = 35.9N<br />

118.7 E Longitude = 118.7E<br />

D<strong>at</strong>um-region<br />

------------<br />

<strong>The</strong> D<strong>at</strong>um-Region for the coordin<strong>at</strong>es is identified by a character<br />

string. Many mapping products currently available use the model <strong>of</strong> the<br />

Earth known as the World Geodetic System 1984 (WGS-84). Other local<br />

models may be in use, and their selection in CALMET will make its output<br />

consistent with local mapping products. <strong>The</strong> list <strong>of</strong> D<strong>at</strong>um-Regions with<br />

<strong>of</strong>ficial transform<strong>at</strong>ion parameters is provided by the N<strong>at</strong>ional Imagery and<br />

Mapping Agency (NIMA).<br />

NIMA D<strong>at</strong>um - Regions(Examples)<br />

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9-20

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