Grid Sector

A Grid Sector is an unofficial name given for a part of the grid (or world map). The name was invented by the Geography Of Second Life group while editing List Of Microcontinents And Sim Clusters. The system proved to be very effective for map orientation.
== Size ==
A Grid Sector is a square with 100 sims length and 100 sims wide. In kilometers, that is about 25.6/25.6 km. It looks like the Linden officials use something similar for the grid map. When you scale the map to lowest resolution, image does not form in the same moment for all the map. Image is formed for different parts of the map, parts that have shape of a square. This means that, at lowest resolution, grid map texture is saved in squares of about 100/100 sims. 
An even smaller division is the Microsector.
== Naming and coordinates ==
The only way to define the position of a structure on the map is by using Coordinates. The coordinates are similar to those used by Gridsurvey, in format longitude (min-max) /latitude (min-max) for a region of map and longitude/latitude for a single sim. The oldest sim, Da Boom, in Sansara, has coordinates 1000/1000.
Grid Sector are named with letters from left (West) to right (East) and with numbers from down (South) to up (North), exactly like the squares in a chess board. Theoretically, they start with grid sector A1 and end with T20. In practice, many grid sectors are in fact void sectors.
== Using grid sectors ==
Unlike coordinates, it is much simpler to manage and understand a grid sector's position. It is a much easier way to find the position of a Continent, Subcontinent, Microcontinent, Sim Cluster, Sim Group or Isolated Sim using a Grid Sector.
== Useful scripts ==
The following script can tell you your Coordinates, sim name and Grid Sector. put it into a HUD prim or an item you wear and when you touch it, you will know where you are:
//Created by Ana Imfinity
list sectors = [
 "zero", "A", "B", "C", "D", "E",
 "F", "G", "H", "I", "J", "K",
 "L", "M", "N", "O", "P", "Q",
 "R", "S", "T", "U", "V", "W"];
default
{
 touch_start(integer num_detected)
 {
 vector regionCorner = llGetRegionCorner();
// 0x100 = 2^8 (2 power 8) = 256
 integer grid_x = (integer)(regionCorner.x/0x100);
 integer grid_y = (integer)(regionCorner.y/0x100);
 integer column_number = (integer)(grid_x/100);
 string column = llList2String(sectors, column_number);
 integer row = (integer)(grid_y/100);
 string sim = llGetRegionName();
 string output = "Current grid position: ("
 + (string)grid_x + ", " + (string)grid_y
 + ")\n\tGrid sector:\t " + column + (string)row
 + "\n\tSim name:\t\t '" + sim + "'";
 llOwnerSay(output);
 }
}
// Example output:
//
// Current grid position: (1023, 1007)
// Grid sector: J10
// Sim name: 'Help Island Public'
== List of grid sectors ==
=== Sectors ===
This list contains also their Coordinates:
*D6, 400-500/600-700
*D7, 400-500/700-800
*D8, 400-500/800-900 
*D9, 400-500/900-1000 
*D10, 400-500/1000-1100 
*D11, 400-500/1100-1200 
*D12, 400-500/1200-1300 
*D13, 400-500/1300-1400 
*D14, 400-500/1400-1500 
*D15, 400-500/1500-1600 
*D16, 400-500/1600-1700 
*E5, 500-600/500-600 
*E6, 500-600/600-700 
*E7, 500-600/700-800 
*E8, 500-600/800-900 
*E9, 500-600/900-1000 
*E10, 500-600/1000-1100
*E11, 500-600/1100-1200
*E12, 500-600/1200-1300 
*E13, 500-600/1300-1400 
*E14, 500-600/1400-1500 
*E15, 500-600/1500-1600 
*F8, 600-700/800-900 
*F9, 600-700/900-1000 
*F10, 600-700/1000-1100 
*F11, 600-700/1100-1200
*F12, 600-700/1200-1300 
*F13, 600-700/1300-1400 
*F14, 600-700/1400-1500 
*G6, 700-800/600-700 
*G7, 700-800/700-800 
*G8, 700-800/800-900 
*G9, 700-800/900-1000 
*G10, 700-800/1000-1100
*G11, 700-800/1100-1200 
*G12, 700-800/1200-1300
*G13, 700-800/1300-1400
*G14, 700-800/1400-1500 
*H8, 800-900/800-900 
*H9, 800-900/900-1000
*H10, 800-900/1000-1100
*H11, 800-900/1100-1200
*H12, 800-900/1200-1300
*H13, 800-900/1300-1400
*H14, 800-900/1400-1500 
*I5, 900-1000/500-600 
*I7, 900-1000/700-800 
*I8, 900-1000/800-900
*I9, 900-1000/900-1000
*I10, 900-1000/1000-1100
*I11, 900-1000/1100-1200
*I12, 900-1000/1200-1300
*I13, 900-1000/1300-1400
*I14, 900-1000/1400-1500 
*J4, 1000-1100/400-500 
*J5, 1000-1100/500-600 
*J7, 1000-1100/700-800 
*J8, 1000-1100/800-900 
*J9, 1000-1100/900-1000
*J10, 1000-1100/1000-1100 
*J11, 1000-1100/1100-1200 
*J12, 1000-1100/1200-1300 
*J13, 1000-1100/1300-1400 
*J14, 1000-1100/1400-1500 
*K10, 1100-1200/1000-1100 
*K11, 1100-1200/1100-1200 
*K12, 1100-1200/1200-1300 
*K13, 1100-1200/1300-1400 
*L9, 1200-1300/900-1000 
*L11, 1200-1300/1100-1200 
*L12, 1200-1300/1200-1300 
*L13, 1200-1300/1300-1400 
*M10, 1300-1400/1000-1100 
*M11, 1300-1400/1100-1200 
*M12, 1300-1400/1200-1300 
*M13, 1300-1400/1300-1400
*Q12, 1700-1800/1200-1300
*R11, 1800-1900/1100-1200
*R12, 1800-1900/1200-1300
=== Rows & Columns ===
Just like at a chess board, grid sectors form squares that can be grouped into 13 rows (from 4 to 16) and 12 columns (from D to M, plus Q and R).
== Gallery ==
File:D6 census.png|D6
File:D7 census.png|D7
File:D8 census.png|D8
File:D9 census.png|D9
File:D10 census.png|D10
File:D11 census.png|D11
File:D12 census.png|D12
File:D13 census.png|D13
File:D14 census.png|D14
File:D15 census.png|D15
File:D16 census.png|D16
File:E5 census.png|E5
File:E6 census.png|E6
File:E7 census.png|E7
File:E8 census.png|E8
File:E9 census.png|E9
File:E10 census.png|E10
File:E11 census.png|E11
File:E12 census.png|E12
File:E13 census.png|E13
File:E14 census.png|E14
File:E15 census.png|E15
File:F8 census.png|F8
File:F9 census.png|F9
File:F10 census.png|F10
File:F11 census.png|F11
File:F12 census.png|F12
File:F13 census.png|F13
File:F14 census.png|F14
File:G6 census.png|G6
File:G7 census.png|G7
File:G8 census.png|G8
File:G9 census.png|G9
File:G10 census.png|G10
File:G11 census.png|G11
File:G12 census.png|G12
File:G13 census.png|G13
File:G14 census.png|G14
File:H8 census.png|H8
File:H9 census.png|H9
File:H10 census.png|H10
File:H11 census.png|H11
File:H12 census.png|H12
File:H13 census.png|H13
File:H14 census.png|H14
File:I5 census.png|I5
File:I7 census.png|I7
File:I8 census.png|I8
File:I9 census.png|I9
File:I10 census.png|I10
File:I11 census.png|I11
File:I12 census.png|I12
File:I13 census.png|I13
File:I14 census.png|I14
File:J4 census.png|J4
File:J5 census.png|J5
File:J7 census.png|J7
File:J8 census.png|J8
File:J9 census.png|J9
File:J10 census.png|J10
File:J11 census.png|J11
File:J12 census.png|J12
File:J13 census.png|J13
File:J14 census.png|J14
File:K9 census.png|K9
File:K10 census.png|K10
File:K11 census.png|K11
File:K12 census.png|K12
File:K13 census.png|K13
File:L9 census.png|L9
File:L11 census.png|L11
File:L12 census.png|L12
File:L13 census.png|L13
File:M10 census.png|M10
File:M11 census.png|M11
File:M12 census.png|M12
File:M13 census.png|M13
File:Z census.png|Q12, R11, R12
== Download ==
To download maps of grid sectors and oceans, use this link. The information is stored on Mega, the succesor of Megaupload, probably the most secure data storage & transfer system. You need Google Chrome to download.
== See also ==
List Of Microcontinents And Sim Clusters - includes detalied data for all grid sectors
Oceans - additional information can be found here, including links to all oceans
Da Boom - the oldest sim and center of coordinates system
List Of Continents
Second Life Geography
Grid Map And Dimensions
Microsector