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Electronic National Land Map




　
UC-win/Road Ver.11.2 newly makes it possible to load electronic national map. Survey data released by the National Land Geographical Institute as terrian data, the function to capture Geospatial tile which is a map image into UC-win / Road are implemented.
　What is Geospatial tile
The Geographical Tile is information that divides the terrain data of nationwide surveyed by the Ministry of Land, Infrastructure and Transport into tiles and makes it public. With regard to maps in Japan, we convert the range excluding some areas of polar regions (more than 85.0511 degrees north latitude and south latitude) so that the longitude and latitude of the world geodetic system can be converted into squares using Mercator projection equations. (The geodetic tile geodetic system is the world geodetic system (JGD 2011) for maps in Japan)

Map image converted into a square for the entire range There are zoom levels of the map and XY coordinates of the tile, and as the zoom level increases by 1, the number of divisions of the tile increases by the second power. By entering the zoom level and tile coordinates according to the specified URL format, map information in the specified range can be acquired. (Source:Geographical Survey Institute Website Geographical Survey Tile List: http://maps.gsi.go.jp/development/ichiran.html)

Information on geographical tiles that can be acquired by UC-win / Road is altitude tile, standard map, light color map, basic land map (ortho image), and land area image information (first period: 1974-1978 taken) . Elevation tiles are reflected as UC-win / Road terrain elevation data, others are reflected on the street map.

Click to enlarge the image.
Example of Geographical Tile Tile Zoom Level 0-2 (Source: Geographical Tile Specification)
http://maps.gsi.go.jp/development/siyou.html#siyou-zm）
　Geographical Institute title loading
In UC-win/Road, read the geographic tile by the following procedure.

  1. Open "File" - "New Project" - "Importing GSI tiles..." - "GSI tile setting". Need to be connected to the internet to obtain the map.
  2. Expand the range you created. You can magnify to any size with the mouse wheel. Drag to move range. You can also specify latitude and longitude.
    • Drag: Move the map
    • Mouse Wheel: zooming in and out of the map

    Click to enlarge the image.
    Geospatial Tile Range Setting Screen
    Click to enlarge the image. Click to enlarge the image.
    Expanding the map

    You can move by clicking on the direction of the menu in the map.
    • Up / down / left / right arrow: Move the map
    • + : Expanding the map
    • - : Shrinking the map

    The zoom level is displayed in the menu bar in the standard map.
    • Maximum zoom level: 17
    • Minimum zoom bell: 2
  3. The map image can be selected from [standard map, light color map, photo map (after 2007), photo map (1974 - 1978)].
    • "Photo Map(after 2007)", Using "Geographical Institute title", "Electronic national land map (Orthorectified image)" which published by Geographical Institute.
    • "Photo Map(1974-1978)", Using "National land image information (Period 1: 1974-1978)".
    • "Photo Map(after 2007)", "Photo Map (1974-1978)" only can support zoom level  9-17, can not specificy zoom level under 10.
    • "Electronic national land standard map (Ortho image)", some areas such as mountainous areas are not photographed, so there are places where images do not exist (January 20, 2015).

    Click to enlarge the image. Click to enlarge the image.
    Standard map Light color map
    Click to enlarge the image. Click to enlarge the image.
    Photo map (after 2007) Photo map (1974 - 1978)

  4. When it is confirmed, the terrain of the display range is generated and the selected map image is displayed as a street map.

It has become possible to be a more compact topographical range than the conventional minimum 10 km square. Terrain meshes can now also acquire meshes finer than the conventional 50 m mesh easily. Expression such as detailed undulations and coastlines etc is possible.

Click to enlarge the image. Click to enlarge the image.
Compact topographical range
Load result
Click to enlarge the image.
Reproduce detailed relief

Arrange the building by defining the aerial photograph and the standard map as a drawing on the topography where expressions can be expressed only in the required range and expressive power has been improved.

Click to enlarge the image.
Terrain expression improvement

(Attention points)
  • When using a project created using this function, it is necessary to comply with the Geographical Survey Institute of Contents. For details, please see "About using Geographical Tiles" on the Geographical Survey Institute website.
  • In this function, the information of Geographical Tiles is being read based on latitude and longitude. On the other hand, the latitude and longitude of UC-win / Road is a simple calculation using project option information, and since the true north direction angle in the plane rectangular coordinate system is not taken into consideration, the error from the plane rectangular coordinate is Occur. Therefore, when reading data (DM file, shapefile, LandXML etc) created in the plane orthogonal coordinate system, caution is necessary as there may be deviation from the information of Geographical Tile. 

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