GRD, ESRI .ASC, .GRD

GRD format provides raster data for ESRI ArcINFO ASCII grid files, usually accompanied by a .prj file that gives projection information.   Manifold can read several different types of .grd formats and will automatically configure for ESRI style .grd when an ESRI GRD is chosen.

 

dlg_import_grd.png

 

To import from GRD format:

 

  1. Choose File-Import from the main menu.

  2. In the Import dialog browse to the folder containing data of interest.

  3. Double-click the file ending in .grd for the data of interest.

  4. A table and an image will be created.

 

 

eg_import_grd01_01.png

 

We can double-click on images that are created to view them.   For a more interesting display, we first create a new data source using a Bing street maps image server as shown in the Example: An Imageserver Tutorial topic.   We then create a map and drag and drop the Bing layer into the map, and then we drag and drop the 105c image into the map.

 

eg_import_grd01_02.png

 

The image appears using the correct projection, but it is all white because we must use the Style  pane to assign a palette to color the elevation values in the image.

 

eg_import_grd01_03.pngeg_import_grd01_04.png

 

We use the Style pane to color the image using a palette and to apply hill shading, as seen above.

 

eg_import_grd01_05.png

 

That provides a more sensible display.  In the illustration above, we have added a transparent streets Google image server layer above the 105c image, to provide better context.  The display shows terrain elevation values in the Yukon.

See Also

Style

 

Maps

 

Images

 

DEM, GTOPO30

 

GRD, Northwood .GRC, .GRD

 

GRD, Surfer .GRD

 

Example: Spectacular Images and Data from Web Servers

 

Example: An Imageserver Tutorial