Navigation:  Productivity Tools (Tools Menu) > Image

Cell-based raster data sets (images and grids) are suited to representing traditional geographic phenomena that vary continuously over space such as building, elevation, and slope. Raster images are also the ideal base map for spatial modeling and analysis .

Raster images have no geo-referencing associated with the image. The modeler must specify the location and dimensions of the image as it relates the modeling domain.

BREEZE supports the following file types: .bmp, .jpg, .tif.

Base maps can also be imported and removed using the Map Manager tool.

To Import a Raster Image

There are two ways to launch this tool.

The BREEZE Import wizard will guide the user through each step of importation.

Step 1: Visualization

Specify where the imported image should be displayed.

Add to Map view (GIS) : A layer containing the imported image will be added automatically into map view after finished.

Add to 3D view : A layer containing the imported image will be added automatically into 3D view after finished.

Select the source of the base map.  A form will be displayed that will allow you to select the image you wish to import.  Very large files should first be reduced in size (to under 5 MB for best performance). A preview off the image will be displayed after the Open button is pressed.  Use the scroll bars on the bottom and right side of the preview to view the entire image.

Step 2: Rotation

You can choose to rotate the image and save it as a new image file. Normally, rotation is only done to align the image with true north.

Rotation: The degrees that the image will be rotated.

Rotate: Specify the degrees to rotate and click the Rotate button. A Save File dialog box will display and promote the user to save the rotated image in a new file. Specify the file name and path, click Save. A new image file will be generated. In the preview window, the image will appear in a new orientation.

Step 3: Image coordinates

Raster images do not contain coordinate information. When importing an image from an image file, the user must specify a reference point to properly position the image file within the modeling domain. There are two ways to do this:

Method 1:
Provide coordinates for SW and NW corners: Specify the exact coordinates for the southwest and northeast corners of the image.

Lon/lat coordinates: Check this check box, the user will be asked to put in longitude and latitude of the southwest and northeast corners of the image. If this check box is uncheck, the user will be asked to put in coordinates of the southwest and northeast corners of the image.

SW X: Easting ( X coordinate) of the southwest corner of the image.

SW Y: Northing (Y coordinate) of the southwest corner of the image.

NE X: Easting (X coordinate) of the Northeast corner of the image.

NE X: Northing (Y coordinate) of the Northeast corner of the image.

SW Lon.: Longitude of the southwest corner of the image in the format of decimal degrees.

SW Lat.: Longitude of the southwest corner of the image in the format of decimal degrees.

NE Lon.: Longitude of the northeast corner of the image in the format of decimal degrees.

NE Lat.: Longitude of the southwest corner of the image in the format of decimal degrees.

UTM zone: The UTM zone in which the image is located. Only necessary if the model object projection is set to UTM.

Hemisphere: The hemisphere where image is located. Only necessary if the model object projection is set to UTM.

NOTE: The image files SW and NE corner coordinates must be based on the same coordinate system used by model objects.

 

Method 2
Use a reference point and known distance between 2 points: Choose one reference point with known coordinates and give the distance between two chosen points to set the scale of the image map.

Using this method, you can click on a known location on the image, and the Image X and Image X text boxes will be filled automatically. If the shift values are already known, 0’s can be entered for the Image X and Y, and the associated shift values entered for Easting and Northing.

Image X: Image X coordinate of the selected location.

Image Y: Image Y coordinate of the selected location.

Easting: Easting ( X coordinate) of the selected location.

Northing: Northing (Y coordinate) of the selected location.

UTM zone: The UTM zone in which the image is located. Only necessary if the model object projection is set to UTM.

Hemisphere: The hemisphere where image is located. Only necessary if the model object projection is set to UTM.

NOTE: The reference point coordinates must be based on the same coordinate system used by model objects.

Step 4: Distance : This step is only required if Method 1 above is selected.  The distance scale sets the image size to correspond to the scale of modeling domain within BREEZE. You will need to identify two known points within the image and specify the distance between those points.

Image X1: The first points' Image X coordinate. Click once on the first known point, this field will be filled automatically.

Image Y1: The first points' Image Y coordinate. Click once on the first known point, this field will be filled automatically.

Image X2: The second points' Image X coordinate. Click a second time on the second known point, this field will be filled automatically.

Image Y2: The second points' Image Y coordinate. Click a second time on the second known point, this field will be filled automatically.

Distance: The distance between the first and the second points.

Step 5: Finish

Press the Finish button and confirm the image was imported to the chosen display windows.

Adjustments to the imported image can be made in the Map Manager tool.  The Map Manager will allow you to remove the image from the project scenario.

 

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