如何使用 Leafletjs 从数据库中提供地图图块 [英] How TO serve Map tiles from a database using Leafletjs

问题描述

Leaflet js 需要以下磁贴源格式:

Leaflet js requires the following tile source format:

http://localhost/tileserver/{z}/{x}/{y}.png

http://localhost/tileserver/{z}/{x}/{y}.png

如何使用 Leafletjs 从数据库而不是文件系统提供平铺图像(和 ASP.net)

How can I serve tile images from a database instead of file system using Leafletjs (and ASP.net)

推荐答案

这可以非常快速且与 Leaflet 无缝衔接:

This works very fast and seamlessly with Leaflet:

显然 Leaflet 只是使用 z,x,y 占位符来请求特定的图块.

Apparently Leaflet just uses the z,x,y place holders to request specific tiles.

生成和返回图块的方式确实非常灵活

How you generate and return the tiles is very flexible indeed

L.tileLayer('**http://localhost/tileserver/tile.aspx?z={z}&x={x}&y={y}**', {
    minZoom: 7, maxZoom: 16,
    attribution: 'My Tile Server'
}).addTo(map);

在哪里Tiles.aspx

Option Strict On

Partial Class tile
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
        Dim z, x, y As Integer

        z = CInt(Request.QueryString("z"))
        x = CInt(Request.QueryString("x"))
        y = CInt(Request.QueryString("y"))

        Dim b() As Byte = DB.GetTile(z, x, y)

        Response.Buffer = True
        Response.Charset = ""
        'Response.Cache.SetCacheability(HttpCacheability.NoCache)
        Response.ContentType = "image/png"
        Response.AddHeader("content-disposition", "attachment;filename=" & y & ".png")
        Response.BinaryWrite(b)
        Response.Flush()
        Response.End()
    End Sub

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