f04e476a6e
feat(SW-3240): Move StaticMap to design-system * Move StaticMap to design-system Approved-by: Joakim Jäderberg
24 lines
882 B
TypeScript
24 lines
882 B
TypeScript
// Helper function to calculate the latitude offset
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export function calculateLatWithOffset(
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latitude: number,
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offsetPx: number,
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zoomLevel: number
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): number {
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const earthCircumference = 40075017 // Earth's circumference in meters
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const tileSize = 256 // Height of a tile in pixels (standard in Google Maps)
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// Calculate ground resolution (meters per pixel) at the given latitude and zoom level
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const groundResolution =
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(earthCircumference * Math.cos((latitude * Math.PI) / 180)) /
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(tileSize * Math.pow(2, zoomLevel))
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// Calculate the number of meters for the given offset in pixels
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const metersOffset = groundResolution * offsetPx
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// Convert the meters offset into a latitude offset (1 degree latitude is ~111,320 meters)
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const latOffset = metersOffset / 111320
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// Return the new latitude by subtracting the offset
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return latitude - latOffset
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}
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