imported>Denelson83 at 00:28, 9 April 2022

2022-04-09T00:28:04Z

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local function grid_extents ( frame )
local series = tonumber(frame.args[1])
local area = (frame.args[2])
local sheet = tonumber(frame.args[3])

local belt
local belt_area_south = {["M"]=12, ["N"]=12, ["O"]=12, ["P"]=12,
["L"]=8, ["K"]=8, ["J"]=8, ["I"]=8,
["E"]=4, ["F"]=4, ["G"]=4, ["H"]=4,
["D"]=0, ["C"]=0, ["B"]=0, ["A"]=0
}
local belt_area_north = {["G"]=12, ["H"]=12,
["F"]=8, ["E"]=8,
["C"]=4, ["D"]=4,
["B"]=0, ["A"]=0
}
local belt_sheet = {[13]=3, [14]=3, [15]=3, [16]=3,
[12]=2, [11]=2, [10]=2, [9] =2,
[5] =1, [6] =1, [7] =1, [8] =1,
[4] =0, [3] =0, [2] =0, [1] =0
}

if series >= 120 then
belt = 160 + series % 10 * 16 + belt_area_north[area] + belt_sheet[sheet]
elseif series < 120 and series % 10 * 16 >= 112 then
belt = series % 10 * 16 + belt_area_north[area] + belt_sheet[sheet]
else
belt = series % 10 * 16 + belt_area_south[area] + belt_sheet[sheet]
end

local strip

local strip_series_high_arctic = {[12] = 16,
[34] = 48,
[56] = 80,
[78] = 112,
[91] = 144
}

local strip_area_southern = {["M"]=12, ["N"]=8, ["O"]=4, ["P"]=0,
["L"]=12, ["K"]=8, ["J"]=4, ["I"]=0,
["E"]=12, ["F"]=8, ["G"]=4, ["H"]=0,
["D"]=12, ["C"]=8, ["B"]=4, ["A"]=0
}
local strip_area_arctic = {["G"]=8, ["H"]=0,
["F"]=8, ["E"]=0,
["C"]=8, ["D"]=0,
["B"]=8, ["A"]=0
}
local strip_area_high_arctic = {["G"]=16, ["H"]=0,
["F"]=16, ["E"]=0,
["C"]=16, ["D"]=0,
["B"]=16, ["A"]=0
}

local strip_sheet_southern = {[13]=3, [14]=2, [15]=1, [16]=0,
[12]=3, [11]=2, [10]=1, [ 9]=0,
[ 5]=3, [ 6]=2, [ 7]=1, [ 8]=0,
[ 4]=3, [ 3]=2, [ 2]=1, [ 1]=0
}
local strip_sheet_arctic = {[13]=6, [14]=4, [15]=2, [16]=0,
[12]=6, [11]=4, [10]=2, [ 9]=0,
[ 5]=6, [ 6]=4, [ 7]=2, [ 8]=0,
[ 4]=6, [ 3]=4, [ 2]=2, [ 1]=0
}
local strip_sheet_high_arctic = {[13]=12, [14]=8, [15]=4, [16]=0,
[12]=12, [11]=8, [10]=4, [ 9]=0,
[ 5]=12, [ 6]=8, [ 7]=4, [ 8]=0,
[ 4]=12, [ 3]=8, [ 2]=4, [ 1]=0
}

local east_limit, west_limit; -- For 1:50,000 scale map sheet
local area_east_limit, area_west_limit; -- For 1:250,000 scale map area

if series >= 120 then
strip = strip_series_high_arctic[math.floor(series / 10)]
+ strip_area_high_arctic[area]
+ strip_sheet_high_arctic[sheet];

east_limit = strip * 0.5 + 48
west_limit = (strip + 4) * 0.5 + 48
area_east_limit = math.floor(strip / 16) * 8 + 48
area_west_limit = math.floor((strip + 16) / 16) * 8 + 48

elseif series < 120 and math.floor(series % 10) >= 7 then
strip = math.floor(series / 10) * 16
+ strip_area_arctic[area]
+ strip_sheet_arctic[sheet];

east_limit = strip * 0.5 + 48
west_limit = (strip + 2) * 0.5 + 48
area_east_limit = math.floor(strip / 8) * 4 + 48
area_west_limit = math.floor((strip + 8) / 8) * 4 + 48

else
strip = math.floor(series / 10) * 16
+ strip_area_southern[area]
+ strip_sheet_southern[sheet];

east_limit = strip * 0.5 + 48
west_limit = (strip + 1) * 0.5 + 48
area_east_limit = math.floor(strip / 4) * 2 + 48
area_west_limit = math.floor((strip + 4) / 4) * 2 + 48

end

local grid_limits = {
["south"] = belt * 0.25 + 40,
["north"] = belt * 0.25 + 40.25,
["area_south"] = math.floor(belt / 4) + 40,
["area_north"] = math.floor(belt / 4) + 41,
["east"] = east_limit,
["west"] = west_limit,
["area_east"] = area_east_limit,
["area_west"] = area_west_limit
}

return "1:50,000 limits: " .. grid_limits["south"], "°N, " .. grid_limits["north"] .. "°N, " .. grid_limits["east"] .. "°W, " .. grid_limits["west"] .. "°W, " .. " - 1:250,000 limits: " .. grid_limits["area_south"] .. "°N, " .. grid_limits["area_north"] .. "°N, " .. grid_limits["area_east"], "°W, " .. grid_limits["area_west"], "°W"
end

return {
grid_extents = grid_extents
}

Module:Sandbox/Denelson83 - Revision history

imported>Denelson83 at 00:28, 9 April 2022