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使用TatukGIS Internet Server (IS) v10輕松實現(xiàn)REST服務

原創(chuàng)|使用教程|編輯：龔雪|2014-01-07 11:00:20.000|閱讀 250 次

概述：上篇文章中，我們介紹了使用即將發(fā)布的新版IS你可以輕松地將現(xiàn)有的地圖項目轉(zhuǎn)換為Web Tiles，本文將為你介紹Internet Server v10如何實現(xiàn)REST服務。

相關(guān)鏈接：

TatukGIS Internet Server (IS) v10可以輕松地創(chuàng)建REST服務，使用JSON編碼公開完整的TatukGIS功能。

示例REST項目中，坐標系之間的重投影展示可以在這里進行測試。下面是Geometry/Project示例的代碼：

    <%@ Page Language="VB" Debug="True" %>
    <%@ Import Namespace="TatukGIS.IS.Extensions.Rest" %>
    <%@ Import Namespace="TatukGIS.NDK" %>

    <!DOCTYPE html>

    <script runat="server">
      Function DoRest(_context As RestHelper) As Object
        Dim geo As JsonGeometry
        Dim res As JsonGeometry

        Dim i_from_cs As Integer = _context.ParamAsInteger("FromCS")
        Dim i_to_cs As Integer = _context.ParamAsInteger("ToCS")
        Dim s_geo As String = _context.ParamAsString("Geometry")

        Dim from_cs As TGIS_CSCoordinateSystem = TGIS_CSFactory.ByEPSG(i_from_cs)
        If from_cs.EPSG = 0 Then
          Throw New Exception("'FromCS' is unknown")
        End If

        Dim to_cs As TGIS_CSCoordinateSystem = TGIS_CSFactory.ByEPSG(i_to_cs)
        If to_cs.EPSG = 0 Then
          Throw New Exception("'ToCS' is unknown")
        End If

        If from_cs.EPSG = to_cs.EPSG Then
          _context.Message = "'FromCS & 'ToCS' represent same CS"
        End If

        Try
          geo = _context.FromJson(Of JsonGeometry)(s_geo)
        Catch ex_tmp As Exception
          Throw New Exception("Bad 'geometry'. " + ex_tmp.Message)
        End Try

        If (geo.Value Is Nothing) Or (geo.Value.IsEmpty) Then
          Throw New Exception("'Geometry' is null or empty")
        End If

        Dim la As TGIS_LayerVector = New TGIS_LayerVector()
        la.CS = from_cs
        la.Open()
        Dim shp_tmp = la.AddShape(geo.Value)
        res.Value = shp_tmp.CreateCopyCS(to_cs)

        Return res
      End Function

      Sub Page_Load()
        Dim rest As New RestHelper( AddressOf DoRest )
      End Sub
    </script>

    <head runat="server">
      <title>Rest - Project</title>
    </head>
    <body>
      Usage etc.
    </body>
    </html>

標簽：GIS

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文章轉(zhuǎn)載自：慧都控件網(wǎng)

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