Documentation
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Overview ¶
Package grid provides utilities to divide a geographic bounding box into a grid of smaller cells. This is useful for overcoming Google Maps' ~120 results-per-search limit: by splitting a large area into many small cells and issuing one search per cell, you can retrieve far more results.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func EstimateCellCount ¶
func EstimateCellCount(bbox BoundingBox, cellSizeKm float64) int
EstimateCellCount returns how many cells GenerateCells would produce without allocating them. Useful for logging or validation.
Types ¶
type BoundingBox ¶
BoundingBox represents a geographic rectangle defined by two corners.
func ParseBoundingBox ¶
func ParseBoundingBox(s string) (BoundingBox, error)
ParseBoundingBox parses a string with format "minLat,minLon,maxLat,maxLon". Example: "40.30,-3.80,40.50,-3.60"
type Cell ¶
Cell represents the center point of a grid cell.
func GenerateCells ¶
func GenerateCells(bbox BoundingBox, cellSizeKm float64) []Cell
GenerateCells divides bbox into a grid where each cell is approximately cellSizeKm × cellSizeKm. It returns the center point of every cell.
The longitude step is adjusted for the latitude of the bounding box centre so that cells are roughly square on the ground.
Example: a 20×20 km area with cellSizeKm=1 produces ~400 cells.
func (Cell) GeoCoordinates ¶
GeoCoordinates returns the cell center in "lat,lon" format, ready to pass to gmaps.NewGmapJob as the geoCoordinates parameter.
Source Files