PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "2009-11-20, DJH Added keyword." RECORD_TYPE = STREAM /*rELEASE_ID = 0001 */ /*rEVISION_ID = 0000 */ OBJECT = DATA_SET_MAP_PROJECTION DATA_SET_ID = "MEX-MSA-HRSC-5-REFDR-PHOBOS-MAPS-V1.0" OBJECT = DATA_SET_MAP_PROJECTION_INFO MAP_PROJECTION_TYPE = "SINUSOIDAL" MAP_PROJECTION_DESC = "An equal-area, pseudocylindrical projection where the central meridian is a straight line. All other meridians are shown as equally spaced sinusoidal curves. Parallels are equally spaced straight lines, parallel to each other. Poles are points. Scale is true along the central meridian and all parallels. Equations (30-1), (30-2), (30-6), (30-7) of USGS Paper 1395 (pp 247,248), were used. The majority of the map projection descriptions in this document follow the descriptions in Snyder (1987) closely. Used keywords and values with respect to map projections follow the PDS 3 standard reference whereas a detailed description of the parameter's scope and definition can be found in the PDS dictionary. LINE_PROJECTION_OFFSET/ SAMPLE_PROJECTION_OFFSET are the line/sample values minus one onto which the map projection origin falls." ROTATIONAL_ELEMENT_DESC = "See ACTON1996" OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = PDSDD2008 /* was PLANETARY_DATA_SYSTEM2008 */ END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "BATSON1990" END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "SNYDER1987" END_OBJECT = DS_MAP_PROJECTION_REF_INFO END_OBJECT = DATA_SET_MAP_PROJECTION_INFO OBJECT = DATA_SET_MAP_PROJECTION_INFO MAP_PROJECTION_TYPE = "EQUIDISTANT" MAP_PROJECTION_DESC = "A cylindrical projection that is neither equal-area nor conformal. The meridians and parallels are equidistant straight lines, intersecting at right angles. Poles are shown as lines. All products are delivered with the Equator being the standard parallel, true to scale and free of distortion, and are thus equal to the Simple Cylindrical projection. Note, this projection is used only in spherical form. Equations (12-1), (12-2), (12-5) and (12-6) from USGS Paper 1395 (p 91) were used. The majority of the map projection descriptions in this document follow the descriptions in Snyder (1987) closely. Used keywords and values with respect to map projections follow the PDS 3 standard reference whereas a detailed description of the parameter's scope and definition can be found in the PDS dictionary. LINE_PROJECTION_OFFSET/ SAMPLE_PROJECTION_OFFSET are the line/sample values minus one onto which the map projection origin falls." ROTATIONAL_ELEMENT_DESC = "See ACTON1996" OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = PDSDD2008 /* was PLANETARY_DATA_SYSTEM2008 */ END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "BATSON1990" END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "SNYDER1987" END_OBJECT = DS_MAP_PROJECTION_REF_INFO END_OBJECT = DATA_SET_MAP_PROJECTION_INFO OBJECT = DATA_SET_MAP_PROJECTION_INFO MAP_PROJECTION_TYPE = "MERCATOR" MAP_PROJECTION_DESC = "A conformal, cylindrical projection where meridians are equally spaced straight lines. Parallels are unequally spaced straight lines, closest near the equator, cutting meridians at right angles. The scale is true along the equator. Poles are at infinity with great distortion of area in polar regions. Equations (7-1), (7-2), (7-2a), (7-4), (7-4a), (7-5) of USGS Paper 1395 (pp 41, 44) were used. The majority of the map projection descriptions in this document follow the descriptions in Snyder (1987) closely. Used keywords and values with respect to map projections follow the PDS 3 standard reference whereas a detailed description of the parameter's scope and definition can be found in the PDS dictionary. LINE_PROJECTION_OFFSET/ SAMPLE_PROJECTION_OFFSET are the line/sample values minus one onto which the map projection origin falls." ROTATIONAL_ELEMENT_DESC = "See ACTON1996" OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = PDSDD2008 /* was PLANETARY_DATA_SYSTEM2008 */ END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "BATSON1990" END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "SNYDER1987" END_OBJECT = DS_MAP_PROJECTION_REF_INFO END_OBJECT = DATA_SET_MAP_PROJECTION_INFO OBJECT = DATA_SET_MAP_PROJECTION_INFO MAP_PROJECTION_TYPE = "LAMBERT_CONFORMAL" MAP_PROJECTION_DESC = "A conformal, conic projection where the parallels are unequally spaced arcs of concentric circles, more closely spaced near the center of the map. Meridians are equally spaced radii of the same circles, thereby cutting parallels at right angles. Scale is true along the standard parallel(s). The pole in the same hemisphere as standard parallel(s) is a point, while the other pole is at infinity. Equations (14-1), (14-2), (15-1), (14-4), (15-1a), (15-2), (15-3), (15-5), (14-9) (14-10) and (14-11), of USGS Paper 1395 (pp 106,107) were used. Batson et al, 1992 suggest quadrangle schemes that apply a secant cylinder Mercator projection for the equatorial to low latitude areas. As this projection is seldomly implemented in common image data and analysis software, the LAMBERT_TWO_PARALLELS projection is used as a substitute. The absolute values of the two standard parallels are set to differ by 0.001 degrees to approximate the secant cylinder Mercator projection. The majority of the map projection descriptions in this document follow the descriptions in Snyder (1987) closely. Used keywords and values with respect to map projections follow the PDS 3 standard reference whereas a detailed description of the parameter's scope and definition can be found in the PDS dictionary. LINE_PROJECTION_OFFSET/ SAMPLE_PROJECTION_OFFSET are the line/sample values minus one onto which the map projection origin falls." ROTATIONAL_ELEMENT_DESC = "See ACTON1996" OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = PDSDD2008 /* was PLANETARY_DATA_SYSTEM2008 */ END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "BATSON1990" END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "SNYDER1987" END_OBJECT = DS_MAP_PROJECTION_REF_INFO END_OBJECT = DATA_SET_MAP_PROJECTION_INFO OBJECT = DATA_SET_MAP_PROJECTION_INFO MAP_PROJECTION_TYPE = "ORTHOGRAPHIC" MAP_PROJECTION_DESC = "An azimuthal projection that is neither conformal nor equal-area. All meridians and parallels are ellipses, circles, or straight lines. This projection resembles a globe in appearance and has much distortion near the edges of the hemisphere shown. There is no distortion at the center only and directions from the center are true. Radial scale factor decreases as distance increases from the center. Scale in the direction of the lines of latitude is true in the polar aspect. In spherical form, the equations (20-3), (20-4), (20-14) and (20-15) of USGS Paper 1395 (pp 149,150) were used. The majority of the map projection descriptions in this document follow the descriptions in Snyder (1987) closely. Used keywords and values with respect to map projections follow the PDS 3 standard reference whereas a detailed description of the parameter's scope and definition can be found in the PDS dictionary. LINE_PROJECTION_OFFSET/ SAMPLE_PROJECTION_OFFSET are the line/sample values minus one onto which the map projection origin falls." ROTATIONAL_ELEMENT_DESC = "See ACTON1996" OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = PDSDD2008 /* was PLANETARY_DATA_SYSTEM2008 */ END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "BATSON1990" END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "SNYDER1987" END_OBJECT = DS_MAP_PROJECTION_REF_INFO END_OBJECT = DATA_SET_MAP_PROJECTION_INFO OBJECT = DATA_SET_MAP_PROJECTION_INFO MAP_PROJECTION_TYPE = "STEREOGRAPHIC" MAP_PROJECTION_DESC = "A conformal, azimuthal projection where the central meridian and a particular parallel (if shown) are straight lines. This is a perspective projection for the sphere. All meridians on the polar aspect and the Equator on the equatorial aspect are straight lines. All other meridians and parallels are shown as arcs of circles. Directions from the center of the projection are true (except on ellipsoidal oblique and equatorial aspects). Scale increases away from the center of the projection. Equations (21-2), (21-3), (21-4), (20-14), (20-15) (20-18), (21-15) of USGS Paper 1395 (pp 157-159) were used. The majority of the map projection descriptions in this document follow the descriptions in Snyder (1987) closely. Used keywords and values with respect to map projections follow the PDS 3 standard reference whereas a detailed description of the parameter's scope and definition can be found in the PDS dictionary. LINE_PROJECTION_OFFSET/ SAMPLE_PROJECTION_OFFSET are the line/sample values minus one onto which the map projection origin falls." ROTATIONAL_ELEMENT_DESC = "See ACTON1996" OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = PDSDD2008 /* was PLANETARY_DATA_SYSTEM2008 */ END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "BATSON1990" END_OBJECT = DS_MAP_PROJECTION_REF_INFO OBJECT = DS_MAP_PROJECTION_REF_INFO REFERENCE_KEY_ID = "SNYDER1987" END_OBJECT = DS_MAP_PROJECTION_REF_INFO END_OBJECT = DATA_SET_MAP_PROJECTION_INFO END_OBJECT = DATA_SET_MAP_PROJECTION END