and continuingto84º latitude, (exceptforthemostnortherly 22. The UTM gridisfurtherdividedintotwentybands metres. Thedistancebetweenthegridlines shownistermedthe'gridinterval'. Depending on the scale of thechart,distancebet t at extended the pointfalls.SomeUTMgridzonesare terms of metres eastandnorthofthefalseor souther the for origins true and 10,000kmsouthofthe t on origins true false origins500kmwestofthe 500,000 metres eastand10,000,000northforthe false coordinateswhichare500,000metreseastand of the grid zones is theintersectionofitscentral meridian withtheequator.Eachgridoriginisassigned central meridian, central tothatzone,whichallgrid Each bandoflatitudeisgivenadesignationletterfr Grid ZoneDesignationAreasareillustratedinFig.10. GZD consists of the number oftheUTMgridzonefo bands. EachGridZoneDesignationAreaisidentifi 23. Grid ZoneDesignationAreasareformedbythein C D E F G H J K L M N P Q R S T U V W X 80º 72º 64º 56º 48º 40º 32º 24º 16º 08º 00º 08º 16º 24º 32º 40º 48º 56º 64º 72º 84º 180º 174º 168º 162º 156º 150º 144º 138º 132º 126º 120º N. 114º 108º 55º N to 64º N Nto64º 55º 72º N to 84º N N to84º 72º 102º Latitude Band 096º 090º 084º Zones Grid UTM Extended 1 Table 9-2 078º 072º 066º Revised Jul 10 060º band which coversthetwelvedegreesbetween 72º 9-2 Fig 10 The UTM Grid UTM The 10 Fig 9-2 054º 048º 042º AP3456 -9-2Position 036º 030º he equator,forthenorthernhemisphere,and500kmwest 024º Zone 35 34 33 32 31 31 36 37 018º 32 012º linesareparallelorperpendicular.Theoriginofeach om C to X(omittinglettersIandO)startingat80º igin inthehemisphereofUTMgridzonewhich ed by a unique Grid Zone Designation (GZD). The ed byauniqueGridZoneDesignation(GZD). E) Eto42º (33º 9º 006º llowed bythedesignationle ween thegridlinesshownis10,000,1,000or100 he expense of others. These are shown in Table 1. he expenseofothers.TheseareshowninTable1. n hemisphere.UTMGridcoordinatesaregivenin 000º 31 tersection of the UTMGridZonesandlatitude 0 metres north for the northern hemisphere, and hemisphere, 0 metresnorthforthenorthern 32 oflatitude.Eachbandcoverseightdegrees Page 10 of21 006º 012º 33 35 37 southern hemisphere.Thiseffectivelycreates 018º 12º 12º (9º E to 21º E) Eto21º (9º 12º 024º (3º 9º 9º (0º to 9º E) to9º (0º 9º E) to3º (0º 3º 030º (21º E to 33º E) Eto33º (21º Eliminated Eliminated 036º Eliminated 042º Width E to 12º E) E to12º 048º 054º 060º 066º 072º 078º 084º 090º 096º tter ofthelatitudeband. 102º 108º 114º 120º 126º 132º N and84º 138º 144º 150º 156º 162º 168º N). 174º S 180º AP3456 - 9-2 - Position 24. Each Grid Zone is sub-divided into columns and rows to form 100,000 metre (100 km) squares (Fig 11). Each column and row is given an identifying letter. Thus, each 100,000 metre square is identified by two letters corresponding to its column and row respectively. This pair of letters is termed the 100,000 metre square identification. Because the UTM Grid covers much of the Earth’s surface, 100,000 metre square identifications will be repeated. To identify individual 100,000 metre squares, the square identification is preceded by the grid zone designation. In Fig 11, it can be seen that there are two 100,000 metre squares designated YA but they are differentiated by the prefix of their UTM Grid Zone Designation Area, (in this case 3Q and 3N). The 100,000 metre squares are fitted into each 6º zone so that they are uniformly spaced about the central meridian of the zone and along the equator. As a result, the 'grid squares' along the borders of the 6º zones do not form squares. 9-2 Fig 11 Identification of 100 km Squares on the UTM Grid 180º 162º 24º 174º 168º 24º BG CG DG UG VG WG XG YG AG EG FG GG KM LM MM NM PM QM TG ZG HG JM RM SG YF BF CF DF EF FF GF KL LL ML NL PL QL TF UF VF WF XF AF ZF HF JL RL SF YE BE CE DE EE FE GE KK LK MK NK PK QK TE UE VE WE XE AE ZE HE JK RK SE XD YD BD CD DD ED FD HD KJ LJ MJ NJ PJ QJ TD UD VD WD AD ZD HD JJ RJ SD YC BC CC DC EC FC GC KH LH MH NH PH QH TC UC VC WC XC AC ZC HC JH RH SC YB BB CB DB EB FB GB KG LG MG NG PG QC TB UB VB WB XB AB ZB HB JG RG SB XA YA BA CA DA EA FA GA KF LF MF NF PF QF TA UA VA WA AA ZA 2,000,000 m HA JF RF SA 2,000,000 m XV YV BV CV DV EV FV GV KE LE ME NE PE QE TV UV VV WV AV ZV HV JE RE SV BU WU XU YU CU DU EU FU GU KD LD MD ND PD QD TU UU VU AU ZU 16º HU JD RD SU 16º WT XT YT BT CT DT ET FT GT KC LC MC NC PC QC TT UT VT AT ZT HT JC RC ST YS BS CS DS ES FS GS KB LB MB NB PB QB TS US VS WS XS AS ZS HS JB RB SS XR YR BR CR DR ER FR GR KA LA MA NA PA QA TR UR VR WR AR ZR HR JA RA SR BQ XQ YQ CQ DQ EQ FQ GQ KV LV MV NV PV QV TQ UQ VQ WQ AQ ZQ HQ JV RV SQ WP XP YP BP CP DP EP FP GP KU LU MU NU PU QU TP UP VP AP ZP HP JU RU SP BN CN VN WN XN YN DN EN FN GN KT LT MT NT PT QT TN UN AN ZN HN JT RT SN WM XM YM BM CM DM EM FM GM KS LS MS NS PS QS TM UM VM AM ZM HM JS RS SM AL BL CL DL UL VL WL XL YL ZL EL FL GL HL JR KR LR MR NR PR QR RR SL TL AK BK CK DK WK XK YK ZK EK FK GK HK JQ KQ LQ MQ NQ PQ QQ RQ SK TK UK VK 8º 8º AJ BJ CJ DJ WJ XJ YJ ZJ EJ FJ GJ HJ JP KP LP MP NP PP QP RP SJ TJ UJ VJ AH BH CH WH XH YH ZH DH EH FH GH HH JN KN LN MN NN PN QN RN SH TH UH VH AG BG CG ZG DG EG FG GG HG JM KM LM MM NM PM QM RM SG TG UG VG WG XG YG AF BF CF XF YF ZF DF EF FF GF HF JL KL LL ML NL PL QL RL SF TF UF VF WF AE BE CE DE EE YE ZE FE GE HE JK KK LK MK NK PK QK RK SE TE UE VE WE XE AD BD CD DD XD YD ZD ED FD GD HD JJ KJ LJ MJ NJ PJ QJ RJ SD TD UD VD WD AC BC XC YC ZC CC DC EC FC GC HC JH KH LH MH NH PH QH RH SC TC UC VC WC AB BB CB XB YB ZB DB EB FB GB HB JG KG LG MG NG PG QG RG SB TB UB VB WB AA BA CA DA WA XA YA ZA EA FA GA HA JF KF MF NF RF SA TA UA VA 0º LF PF QF 0º 180º 162º 174º 168º Revised Jul 10 Page 11 of 21 AP3456 - 9-2 - Position 25. Starting at the 180º meridian and moving eastwards for 18º along the equator, the 100,000 metre columns (including those along 6º zone borders) are lettered alphabetically from A to Z (with I and O omitted). This is repeated at 18º intervals. 26. In odd numbered UTM Grid Zones, the rows of 100,000 metre squares are lettered northwards alphabetically from A to V (with I and O omitted), the partial alphabet being repeated every 20 rows. In even numbered UTM Grid Zones, starting at the equator, the rows are lettered F to V (omitting I and O) followed by A to V (omitting I and O). This is done to increase the distance between 100,000 metre squares with the same square identification. Below the equator, the 100,000 metre rows are lettered northwards in such a way that they fit into the sequence of letters above in the same zone. THE UNIVERSAL POLAR STEREOGRAPHIC GRID Description of the Grid 27. The Universal Polar Stereographic Grid consists of two grids - one covering the North Polar area, (north of 84º N), and the other, the South Polar area (south of 80º S). These grids are based on a polar stereographic projection with the origin of each at the respective pole. The Northern and Southern UPS grids extend to 83º 30' N and 79º 30' S respectively to provide a 30' overlap with the UTM grid. Easting grid lines are parallel to the Greenwich Meridian (0º) and the 180º meridian. Northing grid lines are parallel to the 90º W and 90º E meridians. The grid origins are assigned false coordinates of 2,000,000 metres east and 2,000,000 metres north. When used in conjunction with the UTM grid the UPS Grids provide world-wide coverage. 28. The North polar area is divided into two parts by the Greenwich and 180º meridians (Fig 12). The half containing the West longitudes is given the grid zone designation Y whilst that containing the East longitude is given the grid designation Z. Similarly, the South polar area (Fig 13) is divided into two halves.