ArcObjects Library Reference (Carto)

ITiledMapServer2 Interface

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

[C#]

Example 1: Print Cache Service's Description Information

/*
 *  The function prints all information coming from ICacheDescriptionInfo
 *  Inputs: a TiledMapServer2 object
 *  a map (dataframe) name
 *  Outputs: all information are printed on .NET Console
 */
private void printCacheInfo(ITiledMapServer2 pTiledMap2, string sMapName)
{
    ICacheDescriptionInfo pCacheDscInfo = pTiledMap2.GetCacheDescriptionInfo(sMapName);
    ICacheControlInfo pCacheCtrlInfo = pCacheDscInfo.CacheControlInfo;
    ILayerCacheInfos pLyrCacheInfos = pCacheDscInfo.LayerCacheInfos;
    ITileCacheInfo pTileCacheInfo = pCacheDscInfo.TileCacheInfo;
    ILODInfos pLODInfos = pTileCacheInfo.LODInfos;
    ITileImageInfo2 pTileImgInfo2 = pCacheDscInfo.TileImageInfo as ITileImageInfo2;

    Console.WriteLine("CacheType: " + pCacheDscInfo.CacheType.ToString());
    Console.WriteLine("CacheControlInfo::");
    Console.WriteLine("   ClientCachingAllowed: " + pCacheCtrlInfo.ClientCachingAllowed.ToString());
    Console.WriteLine("LayerCacheInfos::");
    for (int i = 0; i < pLyrCacheInfos.Count; i++)
        Console.WriteLine("   ID: " + pLyrCacheInfos.get_Element(i).ID.ToString() + "; HasCache: " + pLyrCacheInfos.get_Element(i).HasCache.ToString());
    Console.WriteLine("TileCacheInfo::");
    Console.WriteLine("   DPI: " + pTileCacheInfo.Dpi.ToString());
    Console.WriteLine("   Origin: " + pTileCacheInfo.Origin.X.ToString() + "," + pTileCacheInfo.Origin.Y.ToString());
    Console.WriteLine("   SRS: " + pTileCacheInfo.SpatialReference.Name);
    Console.WriteLine("   TileCols: " + pTileCacheInfo.TileCols.ToString());
    Console.WriteLine("   TileRows: " + pTileCacheInfo.TileRows.ToString());
    Console.WriteLine("   LODInfos::");
    for (int i = 0; i < pLODInfos.Count; i++)
        Console.WriteLine("      LevelID: " + pLODInfos.get_Element(i).LevelID + "; Resolution: " + pLODInfos.get_Element(i).Resolution + "; Scale: " + pLODInfos.get_Element(i).Scale);
    Console.WriteLine("TileImageInfo::");
    Console.WriteLine("   Antialiasing: " + pTileImgInfo2.Antialiasing.ToString());
    Console.WriteLine("   CompressionQuality: " + pTileImgInfo2.CompressionQuality.ToString());
    Console.WriteLine("   Format: " + pTileImgInfo2.Format);
}

 

 

Example 2: Find out map tiles for Single Fused Cached Service that intersects with a map extent at a specific scale

/*
 * The funtion computes tile’s URLs that interects the specified map extent
 * Inputs: a TiledMapServer
 *           map (dataframe) name
 *           sTileHandlerURL: is the endpoint URL for the service can be access from IAGSServerObjectName.URL property
 *           MapExtent for which tiles will be calculated
 *           a CacheDescriptionInfo object
 *           Cached scale
 * Outputs: (1) Prints Static URLs for each tile on .NET Console
 *              (2) Prints URLs for each tile (to be used with TileHandler) on .NET Console
 */
private void getMapTilesURL(ITiledMapServer2 pTileMapServer2, string sMapName, string sTileHandlerURL, IEnvelope pMapExtent, double dScale)
{
    ICacheDescriptionInfo pCacheDescriptionInfo = pTileMapServer2.GetCacheDescriptionInfo(sMapName);
    string sCachedVirtualDirectory = pTileMapServer2.GetVirtualCacheDirectory(sMapName, -1);    //LayerID = -1 for Single Fused Cached

    IPoint pTileOrigin = pCacheDescriptionInfo.TileCacheInfo.Origin;
    double dblOriginX = pTileOrigin.X;
    double dblOriginY = pTileOrigin.Y;

    /***********************
     * Getting cache resolution & levelID for the specified scale
     ***********************/
    ILODInfos pLODInfos = pCacheDescriptionInfo.TileCacheInfo.LODInfos;
    double dLODResolution = -1; int iLevelID = 0;
    for (int i = 0; i < pLODInfos.Count; i++)
    {
        if (pLODInfos.get_Element(i).Scale == dScale)
        {
            dLODResolution = pLODInfos.get_Element(i).Resolution;
            iLevelID = pLODInfos.get_Element(i).LevelID;
            break;
        }
    }
    if (dLODResolution == -1)
    {
        Exception e = new Exception(String.Format("LOD for Scale:{0} not found!",dScale));
        throw e;
    }

    /***********************
     * Finding the tile that contains map extent's upper-left & lower-right corner
     ***********************/
    //Calculating Tile's width & height in map unit
    double dblTileWidth = pCacheDescriptionInfo.TileCacheInfo.TileCols * dLODResolution;
    double dblTileHeight = pCacheDescriptionInfo.TileCacheInfo.TileRows * dLODResolution;

    IPoint pPntExtentUL, pPntExtentLR;
    pPntExtentUL = pMapExtent.UpperLeft;
    pPntExtentLR = pMapExtent.LowerRight;
   
    // Tile's Row & Column for map's upper-left corner
    int intULTCOL = (int)Math.Floor((pPntExtentUL.X - dblOriginX) / dblTileWidth);
    int intULTROW = (int)Math.Floor((dblOriginY - pPntExtentUL.Y) / dblTileHeight);

    // Tile's Row & Column for map's lower-right corner
    int intLRTCOL = (int)Math.Floor((pPntExtentLR.X - dblOriginX) / dblTileWidth);
    int intLRTROW = (int)Math.Floor((dblOriginY - pPntExtentLR.Y) / dblTileHeight);

    /***********************
     * Generating URL for each tile that intersects with the map extent
     ***********************/
    string sImgExtension = "";
    if (pCacheDescriptionInfo.TileImageInfo.Format == "JPEG")
        sImgExtension = "jpg";
    else
        sImgExtension = "png";

    string url;
    for (int r = intULTROW; r <= intLRTROW; r++)
    {
        for (int c = intULTCOL; c <= intLRTCOL; c++)
        {
            url = string.Format("L{0:D2}/R{1:D8}/C{2:D8}",iLevelID,r,c);
            Console.WriteLine(sCachedVirtualDirectory + "/" + url + "." + sImgExtension);
            Console.WriteLine(sTileHandlerURL + string.Format("?mapname={0}&layer={1}&level={2}&row={3}&column={4}&format={5}", sMapName, "_alllayers", iLevelID, r, c, sImgExtension));
        }
    }
}

 

 

Example 3: Getting image for a specific tile using GetMapTileEx() function for a Single Fused Cached serivce

/*
 * The funtion gets tiles using GetMapTileEx() function and load that on a PictureBox control
 * Inputs: a TiledMapServer
 *   Level Id
 *  Row Id
 *  Column Id
 *  Image format (by using ICacheDescriptionInfo.TileImageInfo.Format property)
 */
private void getMapTileImg(ITiledMapServer2 pTileMapServer2, int l, int r, int c, string format)
{
    int f = 0;
    switch (format)
    {
        case "PNG":
            f = 0;
            break;
        case "PNG24":
            f = 1;
            break;
        case "PNG32":
            f = 2;
            break;
        case "JPEG":
            f = 3;
            break;
        default:
            f = 0;
            break;
    }

    byte[] imgTile;
    try
    {
        imgTile = pTileMapServer2.GetMapTileEx(m_strDefMapName, l, r, c, f);
    }
    catch (Exception)
    {
        MessageBox.Show(String.Format("Problem loading tile for Level:{0}, Row:{1}, Col: {2}", l, r, c), "", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return;
    }
    MemoryStream ms = new MemoryStream(imgTile);
    Bitmap bmp = new Bitmap(ms);

    pictureBox1.Image = bmp;
}