topomap index manual
Contents
1. Menu Description Input Map Data Site This is where the site coordinate is inputted The site option only ask the user to input one coordinate which is for site A This is a critical entry dialog box because a wrong numerical entry will cause program error To avoid this the OK button will not enable unless the values are inputted correctly And even though all the entry text boxes have correct input values the last text box should lose its focus first before the OK button will enable In case a wrong coordinate value is inputted it will be erased as soon as the text box lost its focus This rule is global for the program including the Map Data Hop dialog box In any of the input dialog box when the value being asked to the user is not correct the OK button will not enable There are certain rules how to input a coordinate value For the three numerical segments Deg Min Sec a white space will separate these values Another space will separate the numerical values from the N E S W selection In case the inputted coordinate is wrong and when the input text box losses its focus the value will be erased N or S must be placed at the end of the latitude value while W or E must be placed at the end of the longitude value There are many disabled functions when only a site is chosen in the Input Map Data menu The Site selection only means that only the map for the site will be retrieved 6 2 Map Data Hop Map2. Axis ci H From Nearest Side a C From Farthest Side From Top Side From Bottom Side Vertical Axis l Vertical Axis Unit From Top Side C From Bottom Side From Nearest Side From Farthest Side From Top Side From Bottom Side From Nearest Side From Farthest Side Kilometer C Mile Fig 6 Site Location dialog box Menu Description 6 6 Options Site Location Site Location is where to set parameters when plotting the site into the Cancel UK pe map The unit can be set into kilometer or mile Edit Map Data Edit Map Data x Map Name BALABAC Map No 2443 I Add Latitude 1 07 46 57 39 N Latitude 2 07 50 00 00 N Longitude 1 117 00 00 00 E Longitude 2 117 05 50 79 E Delete Map No Map Name Latitude 1 Latitude 2 Longitude 1 Longitude 2 Date CATAGUPAN PORT CIEGO BAY BUGSUK SILOMSILOM BANCALAN ISLAND CAPINAN SAPA KATIPUNAN GANDAN POINT CULASIAN BULALOC TARUSAN O 46 57 39 N 08 00 00 00 N 107 46 57 39 N 08 0914 83 N 08 00 00 00 N 08 10 00 00 N 08 30 00 00 N 08 20 00 00 N 08 20 00 00 N 08 30 00 00 N 08 50 00 00 N 08 40 00 00 N 08 30 00 00 N 07 50 00 00 N 08 10 00 00 N 07 50 00 00 N 08 10 00 00 N 08 10 00 00 N 08 20 00 00 N 08 40 00 00 N 08 30 00 00 N 08 30 00 00 N 08 40 00 00 N 09 00 00 00 N 08 50 00 00 N 08 40 00 00 N 116 55 36 02 E 116 45 00 00 E 117 00 00 00 E 11
3. Orientation Box This will draw the orientation of the maps after they had been retrieved from the databank Each map will be labeled by a number which is related and listed on the map information box 5 0 MENU BAR 5 1 File Manages the file Extension name for a file is tpo New Open Save Save As Print Printing is preconfigured on A4 paper size using HP Laserjet printer Exit 5 2 Scale This menu chooses the map scale Only the map type in the databank will be shown A check on the left hand side will appear on the submenu chosen lt gt means user defined name in the databank When a new map type whether within or on another scale is chosen it will not be shown immediately on the page layout The layout should loss its focus first say by opening a dialog box before it will be changed 1 5 000 lt Type A gt File name for databank is Map005a hzn lt Type B gt File name for databank is Map005b hzn lt Type C gt File name for databank is Map005c hzn 1 10 000 lt Type A gt lt Type B gt lt Type C gt 1 25 000 lt Type A gt lt Type B gt lt Type C gt 1 50 000 lt Type A gt lt Type B gt lt Type C gt 1 250 000 lt Type A gt lt Type B gt lt Type C gt 5 3 Input Map Data Site Hop Title Block 5 4 Options Path Length Site Location Reverse Data 5 5 Edit Map Data Map Factor 5 6 Help File name for databank is Map010a hzn File name for databa
4. with the Philippines This can be changed according to the location or how far the area from the equator The longitudinal map factor will be reduced significantly as the area for the map information goes away the equator The map factor can be changed but will be in effect only after the program is terminated and re opened The map factor is stored with the map type in the databank The entry range for the latitude is 100 to 120 km deg while for the longitude it is from O to 120 km deg The map factor for longitude is expected to change as the area for analysis goes away from the equator All the computed values referring to the distances and azimuths will defend on the map factor for a particular map type For example Fig 17 and Fig 18 show two similar hops on different map types Since these map types acquire different map factor perhaps a difference in decimal the computed distances and azimuths are different The map factor determines relationship between linear and angular distance of two points on the earth These points are actually the site locations Map factor is the ratio of the linear and angular distance with km deg as the unit Two map factors are used in the program one for vertical axis or the latitude and the other is for the horizontal axis or the longitude 7 0 OTHER SIGNIFICANT MESSAGES 7 1 No Maps Dialog Box As soon as the OK button is pressed on the Map Data dialog box the message below will ap
5. 357 S357 NORZAGAYRAY MONTALBAN 3164 II STA MARIA 3263 IV MANILA amp Q C Digital Microwave Corporation NESIC PHILIPPINES INC Fig 11 Plotting a Site by the X and Y Values 15 0 RETRIEVING PROCESS A retrieving process for a hop is the most comprehensive part of this program And it is believe that it is the heart or the main part of this application When site information had been inputted and the program starts looking for maps it scanned the path twice The first scan is fast scan and the second is thorough Scanning process starts at distance zero from site A and jumps into interval distances value approaching to site B The distance intervals actually represent points along the hop path which also represent coordinate values A coordinate value is test if within the scanned map When it happens to be within that map it retrieves the map and goes on the next interval The next interval will be calculated so that it will be outside that map boundary And this would make the scanning process faster It repeats the scanning process until all the maps for the hops had been retrieved The first scanning which is the fast scanning has greater distance interval The main purpose of this scan is to detect all the maps compute for maximum space that can be occupied and set a temporary space factor The second scanning which is the thorough scanning has lesser distance interval Using the temporary space 14 factor it re
6. 7 15 00 00 E 117 00 00 00 E 116 59 00 00 E 117 15 00 00 E 117 15 00 00 E 117 00 00 00 E 117 00 00 00 E 117 15 00 00 E 117 15 00 00 E 117 30 00 00 E 117 00 00 00 E 117 00 00 00 E 117 05 50 79 E 117 20 51 16 E 117 15 00 00 E 117 15 00 00 E 117 30 00 00 E 117 32 00 00 E 117 15 00 00 E 117 15 00 00 E 117 30 00 00 E 117 30 00 00 E 117 45 00 00 E Jun 11 97 May 19 97 Jun 07 97 Jun 11 97 May 20 97 Jun 11 97 May 20 97 Jun 11 97 Jun 11 97 Jun 11 97 Jun 11 97 Jun 11 97 Map Quantity 1043 Map Type 300 SERIES M Map Type 300 SERIES 1 50 000 M Update Close Scale Fig 7 Edit Map Data dialog box Menu Description Options Edit Map Data Edit Map Data is where map information is inputted in the databank At the first glance of the software all important functions are disabled until only the databank is filled up The columns or fields in the databank table are Map No Map Name Latitude 1 Latitude 2 Longitude 1 Longitude 2 and the Date when the map is inputted or edited The map information can be sorted on any of these fields for easy viewing It happens when the button for that field is depressed 6 7 Map Factor lt Map Type gt 109 398 Km Deg Longitude 109 398 Km Deg OK Fig 8 Map Factor dialog box Latitude Cancel Menu Description Edit Map Factor The default map factor is based on the map in the Philippines or the factor along the longitudinal line
7. Data Hop X Site A Site B Fig 3 Map Data Site Name Manila Angat Hop dialog box Latitude 14 36 41 89 N 1455 08 57 N Longitude 120 58 21 40 E 121 01 05 71 E UK Cancel Menu Input Map Data Hop Description The hop option allows the user to input two coordinates for site A and site B Hop selection means that all the maps along the hop path will be retrieved Ancillary calculation will also be made for the hop such as the distance and the azimuth 6 3 Title Block Fig 4 Title Block dialog box Title Block X Digital Microwave Corporation NESIC PHILIPPINES INC RAH x __Seneet_ Menu Input Title Block 6 4 Path Length Path Length X Fig 5 Path Length dialog box Menu Options Path Length Description 6 On the Measurement frame Each Map means measurement of the path length for each map on the list Cumulative means cumulative measurement from distance zero at site A The unit can be set to kilometer or mile The calculated measurement is shown on the third column of map information box Fig 11 shows an Each Map measurement while Fig 1 shows a Cumulative measurement 5 Site Location Site Location Map Measurement Positive Sign Horizontal Axis SiteA SiteB C From Left Side Horizontal Axis From Right Side Horizontal Axis C From Left Side C From Left Side C From Right C From Right Side Vertical
8. E A SITEB SITE NAME Baguio San Fernando LATITUDE 16 23 12 37 N 16 34 32 37 N LONGITUDE 120 34 29 80 E 120 18 04 22 E NORTH AZIMUTH 304 994 124 994 MAP NO MAP NAME 71751IV BAGUIO CITY 10 06 70751 ARINGAY 21 99 7076 II SAN FERNANDO 36 65 Digital Microwave Corporation NESIC PHILIPPINES INC Fig 17 An illustration hop analysis 15 x i Topomap Index b sf tpo File Scale Input Options Edit Help Topomap Index Scale 1 50 000 SITE A SITEB SITE NAME Baguio San Fernando LATITUDE 16 23 12 37 N 16 34 32 37 N LONGITUDE 120 34 29 80 E 120 18 04 22 E AZIMUTH 304 604 NORTH 124 604 3169 III BAGUIO CITY 3069 II ARINGAY 3069 I SAN FERNANDO Digital Microwave Corporation By RAH NESIC PHILIPPINES INC Fig 18 An illustration of the same hop in Fig 17 but using different map type 20 17 6 Nota Hop But Only a Site When the user intends to look only for the map of a particular site he can do this by choosing the Site entry dialog box under the Input Map Data menu When the user wants to obtain the site from a hop file he can do this by loading the hop file and choosing the Map Data Site dialog box Site A will be captured on the dialog box In any case the user wants to save site B he can do this by reversing the data and choosing the Map Data Site dialog box i Topomap Index m tpo O x File Scale Input Options Edit Help Topomap Index SI
9. RAH NESIC PHILIPPINES INC Fig 12 An illustration when a map information is not available 17 2 Map Information Is Not Available B This is similar to part A However the map may have been unavailable in the databank because it is not inputted Figures 13 and 14 show before and after the map is put in placed in the databank 16 i Topomap Index b ma tpo O x File Scale Input Options Edit Help SITEA STEB Topomap Index SITE 4 SITE SITE NAME Butuan Mt Amaloi Scale 1 50 000 LATITUDE 08 56 45 72 N 08 26 32 39 N LONGITUDE 125 32 18 40 E 125 08 45 68 E AZIMUTH 217 921 37 921 So NO ee SS NAME 4146 IV BUTUAN 4046 1 BUENAVISTA 40451 BANAGUIT 4045 I CALABUGAO PLAIN 4045 III DUMALAGUING Digital Microwave Corporation NESIC PHILIPPINES INC Fig 13 An illustration when map information is not available F Topomap Index b ma tpo ii xi File Scale Input Options Edit Help SITEA SITEB Topomap Index ame see 5 SITE NAME Butuan Mt Amaloi Scale 1 50 000 LATITUDE 08 56 45 72 N 08 26 32 39 N LONGITUDE 125 32 18 40 E 125 08 45 68 E AZIMUTH 217 921 37 921 4146 IV BUTUAN 4046 I BUENAVISTA 4046 II MAASIN 40451 BANAGUIT 4045 IV CALABUGAO PLAIN 4045 111 DUMALAGUING Digital Microwave Corporation By RAH NESIC PHILIPPINES INC Fig 14 The missing map information in Fig 13 has been inputted in the databank to correct the contents of map orientation box and the map info
10. TE NAME Manila Kea Scale 1 50 000 LATITUDE 14 36 41 89 N LONGITUDE 120 58 21 40 E AZIMUTH MAP TYPE GOOSERIES PATH LENGTH Km MAP NO MAP NAME ii 3263 IV MANILA amp Q C T Digtal Microwave Corporation NESIC PHILIPPINES INC Fig 19 An illustration of site analysis 18 0 PRINTING The printing is set based on a HP Laserjet printer The property setting of the active printer should be set to landscape and A4 size paper The program itself does not have any print preview The main page is the actual printing layout When printing on a different type of printer the page layout elements will still be printed but will be disoriented When the print menu is chosen without any printer connected to the network or to the computer an error message will appear This is 21 not trapped by the program and it will caused it to be terminated The loaded or current file will not be saved HP LaserJet 5000 Series Properties 11x17 11x17 Ov Executive b a Be J gi E AutoSelect Tray a USEGTIT l rooms Atow Rote Dott Fig 20 Printer Properties dialog box 22
11. TopoMap Index User s Manual Prepared by Roberto A Hizon Jr Electronics and Communication Engineer June 2002 5 0 6 0 7 0 8 0 10 0 11 0 12 0 13 0 14 0 15 0 16 0 17 0 18 0 INDEX OF CONTENTS INTRODUCTION OBJECTIVE SOFTWARE ARCHITECTURAL DESIGN PAGE LAYOUT ELEMENTS 4 1 Software Title Box 4 2 Site Information Box 4 3 Map Information Box 4 4 Title Block 4 5 Map Orientation Box MENU BAR 5 1 File 2 Scale 3 Input 4 Options 5 Edit 6 Help DIALOG BOXES 1 Map Data Site 2 Map Data Hop 3 Title Block 4 Path Length 5 Site Location 6 Edit Map Data 7 Map Factor lt Map Type gt OTHER SIGNIFICANT MESSAGES 7 1 No Maps Dialog Box 7 2 Percentage Bar STORAGE OF DATA SCALE AND MAP TYPE OPTIONS INPUT CALCULATED AND RETRIEVED VALUES RESIDING FILE SYSTEM FILE NAME EXTENSION SOFTWARE INSTALLATION PLOTTING A SITE ON THE MAP RETRIEVING PROCESS COMPUTING METHODOLOGY CASE ANALYSIS 17 1 Map Information Is Not Available A 17 2 Map Information Is Not Available B 17 3 An Irregular Map 17 4 A Strange Size of a Map 17 5 A Hop Analysis on a Different Map Type 17 6 Nota Hop But Only a Site PRINTING 5 5 5 5 5 6 6 6 6 6 6 6 1 0 INTRODUCTION TopoMap Index is a software application written to find topographic maps A hop analysis can be save just like an ordinary profile in Pathloss software This software application works well with Pathloss This pr
12. ddmenu hzn These files will store current information for the program when it is terminated 12 0 FILE NAME EXTENSION tpo dot tpo This is the file extension of the particular hop information the user file hzn dot hzn This is the file extension of all the files created to store parameter settings and map databank 13 0 SOFTWARE INSTALLATION The topo exe should be copied to a default directory C Windows Hizon Topomap All the file systems will be created on this directory It is important to create this directory before running the program to prevent an error It is recommended to copy three system files under the C Windows System directory These are the Grid vbx Threed vbx and the Vbrun300 dll These three files are needed to run the program but do not exist in today s computer 14 0 PLOTTING A SITE ON THE MAP This is made easier by the X and Y values appearing in the site information box for both sites A and B Distance from the map boundary will be calculated to determine the X and the Y axes from it The measurement can be set from any of the left or right boundary for the X axis and top or bottom boundary for the Y axis This can be done on the Site Location dialog box 13 Topomap Index m a tpo Mm x File Scale Input Options Edit Help Topoma p Index SITE NAME aver a e 4 p nga NORTH Scale 1 50 000 LATITUDE 14 55 08 57 N 14 36 41 89 N LONGITUDE 12101 05 71 E 120 58 21 40 E 188
13. erent from what is computed in Pathloss Remember that the computation in Pathloss took into consideration the earth curvature On this program it is purely a flat earth or two dimensional mathematical methodology This method is much closer in principle on the actual measurement on hardcopy maps Any hop crossing between the two hemispheres that is a crossing on the equator is anticipated and corrected on the program The hop crossing between E and W at O degree is also anticipated and corrected However a limitation of the program is evident when there is a hop crossing between E and W at 180 degrees This is not corrected 17 0 CASE ANALYSIS 17 1 Map Information Is Not Available A 15 This scenario happens when a hop is passing an area without any available maps The figure shows that somewhere in the middle of the path maps are not provided In reality this area may be water structure such as sea Please note of item no 2 on the map list Although there is no map the distance is still calculated This feature will reduce human error when actual map profiling is on the job 15 x i Topomap Index m j tpo File Scale Input Options Edit Help Topomap Index y ajao agna Scale 1 50 000 LATITUDE 09 15 06 65 N 09 39 23 80 N NORTH LONGITUDE 124 43 01 49 E 124 21 54 20 E AZIMUTH 318 986 138 986 MAP NO MAP NAME 3947 IV MAMBAJAO 11 83 51 50 3248 IV JAGNA 58 69 Digtal Microwave Corporation By
14. in the databank will be set active These active scales will appear on the scale menu Only the map type with inputted map information will appear under the Scale lt scale gt submenu There are only three map types allowed for each scale type In case the map types are grouped and there are more than three types used for a project the default directory for the program can be manipulated instead The file name Map hzn for one map type can be set aside on a different directory and the new map type with the same file name can be copied or created in the default directory 10 0 INPUT CALCULATED AND RETRIEVED VALUES User Input Values Site Information Site Name Latitude Longitude Title Block First Row Second Row Initials This portion is always translated to its uppercase character Date This is computer generated File Name Calculated Values Site Information Azimuth X lt unit gt Y lt unit gt Map Information Path Length lt unit gt Retrieved Values Map Data The retrieved values are basically the map data They are retrieved whenever a map scanning process is on going These are listed on the map information box The orientation of the map is shown on the map orientation box 11 0 RESIDING FILE SYSTEM Other residing file systems aside from the databank are Setup hzn Miscella hzn 12 z Titleblo hzn Direct hzn Mapfact hzn Mapfact1 hzn A
15. nk is Map010b hzn File name for databank is Map010c hzn File name for databank is Map025a hzn File name for databank is Map025b hzn File name for databank is Map025c hzn File name for databank is Map050a hzn File name for databank is Map050b hzn File name for databank is Map050c hzn File name for databank is Map250a hzn File name for databank is Map250b hzn File name for databank is Map250c hzn This is where the site information is inputted This is where site coordinate and site name is inputted A check will appear on the left hand side if that submenu is chosen Entry dialog box for one site site A Entry dialog box for two sites sites A and B Additional information for the page layout Two rows are available for user input Boxes for initials date and file name are also available Customizable parameter settings This is for map measurement along the path of the hop This feature is for map plotting Changes site A to site B and vice versa Reverse Data is analogous to Pathloss s reverse profile This is particular for databank management An entry dialog box for angular and linear distance relationship Learning Topomap Index Not provided This is disabled About Topomap Index 6 0 DIALOG BOXES 6 1 Map Data Site Fig 2 Map Data Site dialog Site Name Manila ap box Latitude 14 36 41 89 N Longitude 120 58 21 40 E
16. ogram is applicable to all places in the world as long as the map data is inputted in the databank first for that particular area or country Some country is very sensitive in giving map information So with this software they have a chance to input the map information themselves and later on delete after the project The field that this software was inspired from is radio transmission profession However this can be used by other professional to retrieved maps for a large scale project 2 0 OBJECTIVE The reason that this software application was written is to ease up the jobs of RF engineers and to reduce human error when doing manual work In the experience of the author on how difficult it is to find maps plot site on map and visualize their orientation based on hop path these jobs are included in the software application program With this program it is easier to look for the topographic maps needed for site and path survey It is sure that on site there will still be a form of a hardcopy map rather than a soft copy Most of the radio transmission projects are situated in developing countries where digitized map is not actually provided And in actual fieldwork hard copy maps are brought instead of analyzing the digitized map on a laptop 3 0 SOFTWARE ARCHITECTURAL DESIGN The software is written in Visual Basic 3 0 The limitation of VB 3 0 hinders the creation of the software application to its fullest Some few features of an
17. ordinary Windows application will not be shown on this However the functionality is definitely natural The font used for the display is Times New Roman 4 0 PAGE LAYOUT ELEMENTS Menu Bar Software Title Bex Site Information Box F Topom p Index m a tpo File Scale Input Options Edit Help S Topomap Index i Wn Scale 1 50 000 LATITUDE 14 36 41 89 N 14 55 08 57 N 5 LONGITUDE 120 58 21 40 E 121 01 05 71 E Z AZIMUTH 8 445 188 445 MAP TYPE 300 SERIES PATH LENGTH Km 34 02 MAPNO MAP NAME 3S MANILA amp Q C i STA MARIA S MONTALBAN NORZAGAYRAY ies O D gt cm pu S lt 5 5 aan A Digital Microwave Corporation By RAH NESIC PHILIPPINES INC Title Block Fig 1 Page Layout Elements 4 1 Software Title Box This shows the Topomap Index title and the map scale chosen by the user 4 2 Site Information Box This will show the inputted site parameters plus the calculated values for the hop 4 3 Map Information Box Inside this box will list down all the necessary maps where a hop will pass through It will indicate a column for map name map no and PL path length Path length can be cumulative measurement from site A or a measured distance for each map 4 4 Title Block Title block just shows additional information on the page layout This is almost similar to the title block of Pathloss The initials will always be converted to uppercase characters 4 5 Map
18. pear to inform the user that a certain percentage of the path length has no maps available The percentage value is determined in the first scan process If the OK button is pressed the second scan process will proceed 10 No Maps 7 Almost 70 of signal path did not pass through any maps Do you want to continue Fig 9 No Maps dialog box 7 2 Percentage Bar These days this portion is called the flooding It is unfortunate that flooding is not a feature of VB 3 0 The percentage bar is used instead Scanning process will take a long time to finish percentage bar will inform the user how much percentage is done on the scanning process Percentage bar will also appear when sorting map data on the Edit Map Data dialog box The percentage bar reminds the user that the computer because of the span of time to scan did not hang Fig 10 Percentage Bar 72 Complete 8 0 STORAGE OF DATA The storage of information is basically a file system and not a database system A file is created whenever new information needs to be stored These can be the parameter setup of the application or the map databank On parameter setup when the program is closed and reopened this will be the last value that had been inputted 9 0 SCALE AND MAP TYPE OPTIONS 11 There are only five scale options included in the program so far Among the five scale options only those which have inputted map information
19. rmation box 17 17 3 An Irregular Map In Fig 15 please note that the distances for items 3 4 and 5 on the map list are still provided A label inside map number 4 is not provided The program will not display the label when the map appears too small in the map orientation box Please see Fig 16 for example In case all the labels are not shown site A and site B can still be easily determined by observing the calculated azimuth Items no 4 and 6 is actually only one map A hardcopy of this map will show that item no 4 is an inset of item no 6 This program helps the user to determine if that inset will be a passageway of the hop or not The creation of topographic map for each country seems to be in perfect tile arrangement However it is not always true in certain areas of the world with many dispersed islands and islets Archipelago such as the Philippines will have a scattered map arrangement This is not really a problem for this program It inputs map data depending on its map boundaries consisting of two latitudes and two longitudes itm T opomap Index m bi tpo lel xi File Scale Input Options Edt Help Topomap Index SITE NAME Mabso Bitinan Island Scale 1 50 000 LATITUDE 06 33 27 61 N 06 03 46 67 N LONGITUDE 121 53 25 70 E 121 26 35 80 E AZIMUTH 222 112 42 112 MAP NO MAP NAME MALUSO MANGAL CAPUAL ISLAND CAPUAL ISLAND Digtal Microwave Corporation NESIC PHILIPPINES INC Fig 15 An illustration of an i
20. rregular map 18 17 4 A Strange Size of a Map Since the databank is a user input data storage entering values are prone to human error During the retrieving process and what appears in the map orientation box is a strange map size the coordinate boundary of this map may have been inputted wrongly This can be corrected in the Edit Map Data dialog box After the map has been corrected it will be the same as Fig 14 i Topomap Index b ma tpo Og x File Scale Input Options Edit Help Topomap Index SITE NAME Butuan Mt Amaloi Scale 1 50 000 LATITUDE 08 56 45 72 N 08 26 32 39 N NORTH LONGITUDE 125 32 18 40 E 125 08 45 68 E AZIMUTH 217 474 37 474 MAP TYPE 300 SERIES MAP NO MAP NAME 4146 IV BUTUAN 40461 BUENAVISTA 4046 II MAASIN 40451 BANAGUIT 4045 IV CALABUGAO PLAIN 4045 III DUMALAGUING Digital Microwave Corporation NESIC PHILIPPINES INC Fig 16 An illustration of wrongly inputted map data 17 5 A Hop Analysis on a Different Map Type Sometimes military topographic maps are provided in different versions for particular area The user can still obtain the necessary maps for a hop with different map types The figures show two map types in the same scale It is also possible to obtain necessary maps in different scales as long as they are residing in the same area 19 BEE i Topomap Index b sf tpo File Scale Input Options Edit Help I Topomap Index Scale 1 50 000 SIT
21. scan the maps compute for theirs sizes so that they would fit just enough for the map orientation box As the second scanning is in process it draws the maps in the map orientation box and lists them in the map information box at the same time The maps drawn are just connecting rectangles with label inside it This label is related to the map item number in the map information box There are instances that there are no maps available on a certain portion or on its entirety of the hop When the scanning process detects no map it will take time to finish the scanning That is the reason why the first scan has a greater distance interval to hasten the process in case there would be no map seen After the first scan and it sees no map for a portion or entire hop it asks the user to continue the second scan or not A dialog box will inform the user on how much path percentage the map is not available The two reasons why there may be no maps scanned are That portion of the hop has no official map provided This can be a water structure such as the sea a There is no map inputted in the databank Remember that the maps that will be retrieved must reside first in the databank 16 0 COMPUTING METHODOLOGY The calculation is made purely based on a flat earth and not considering earth curvature or magnetic north The main formula in calculation is Pythagorean theorem The calculated values such as the azimuth and the path distance will be diff
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