tilemerge

package module

v0.0.0-...-8df384c Latest Latest Go to latest Published: Apr 12, 2018 License: MIT Imports: 7 Imported by: 0

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Repository

github.com/brendan-ward/tilemerge

Links

Open Source Insights

README ¶

tilemerge

Merge 2D map tiles into a single image.

Requires Go 1.9+

Under heavy development!

Purpose

This library is intended to assist with merging individual map tiles into a single image.

A common use case is to create a static map image from an interactive Leaflet.

TODO:

Handle anti-meridian wrapping and several world-widths
Handle negative offets and width / height larger than tiles
Flag for test to update golden files
Test with transparency
Test with missing tiles
Test with paletted PNGs
Test with webp tiles
Documentation

Dependencies

Dependencies are managed using dep

Similar libraries

go-staticmaps

Documentation ¶

Index ¶

Constants
func Merge(tiles Tiles, xOff, yOff, width, height int, bg color.Color) (image.Image, error)
type Tile
type Tiles

Constants ¶

View Source

const TILE_SIZE = 256

TILE_SIZE uses default size of map tiles for now TODO: probably should be a parameter or detected from the input images

Variables ¶

This section is empty.

Functions ¶

func Merge ¶

func Merge(tiles Tiles, xOff, yOff, width, height int, bg color.Color) (image.Image, error)

Merge merges input Tiles into a single Image with dimenensions `width` and `height`, and crops based on xOff, yOff from upper left of image. Tile x and y coordinates increase from the upper left of the image. Any tile that

Types ¶

type Tile ¶

type Tile struct {
	Z    uint8 // don't really need to know this here
	X, Y int
	Data *[]byte // nil if there is no valid image data for this tile coordinate
}

Tile is a container for basic information about a tile

type Tiles ¶

type Tiles struct {
	Tiles          []Tile
	X0, Y0, X1, Y1 int
}

Tiles wraps Tile structs with information about the x and y tile index ranges

Source Files ¶

View all Source files

tilemerge.go

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