Help file for SFWMD imagery Index
Buttons and Tools
Click a button or tool for help:
Query
Wizard
Use the query wizard button to quickly choose images by type and by year(s).
First choose the satellite type, then click OK:
Then choose the start year, click OK. Note that if you select all years, the next dialog box will not appear.
Choose the end year (if applicable), click OK:
The image boundary for each image selected is displayed on the view. Note that image boundaries are drawn using different colors based on satellite type. The number of selected images is displayed on the status bar at the bottom left corner of the window.
Query
by Year
Choose images by year.
Each time the user selects Query by Year, Query by Type, or Query by County, the Selection Type dialog box appears. Choose New to begin a new selection. This is the default. Choose Add to add images to the currently selected set of images. Choose Subset to subset out images from the currently selected set. Click the OK button once you have chosen the selection type.
Choose the range of years from the Choose images by Year dialog box. You may select one year or multiple years by clicking once on one or more choices. In the following example, all years between 1994 and 1997 will be used for the query. Click the OK button when finished.
The image boundary for each image selected is displayed on the view. Note that image boundaries are drawn using different colors based on satellite type. The number of selected images is displayed on the status bar at the bottom left corner of the window.
Query
by Type
Choose the type of imagery.
The Selection Type dialog box will appear first. Select either New, Add or Subset. Click the OK button once your selection is made. Then choose the satellite type from the list:
Once you have made your selection, click the OK button to select images that satisfy your query. The image boundary for each image selected is displayed on the view. Note that image boundaries are drawn using different colors based on satellite type. The number of selected images is displayed on the status bar at the bottom left corner of the window.
Select
County
Click to select a county, draw a box to select multiple counties.
When a single county is selected, it is highlighted in cyan. The name of the county is displayed in the lower left-hand corner. If multiple counties are selected, all selected counties are highlighted in cyan. You must first select at least one county if you wish to perform a Query by County.
Query
by County
Choose images based on county (or counties) selected.
The Selection Type dialog box will appear first. Select either New, Add or Subset. Click the OK button once your selection is made. Choose the relation type from the list:
Choose Intersects to select all images which intersect the selected county. Choose Has Center Within to select all images which have their center within the selected county. Choose Contains the Center Of to select all images which contains the center of the selected county. Choose Completely Contains to select all images which completely contain the selected county. Click OK when finished to select images.
Select
images (Intersect)
Click to select images which intersect with point clicked or rectangle drawn.
Simply click anywhere on the Florida graphic. All images which intersect with the point you clicked are selected. To draw a rectangle, hold down the mouse button, move the mouse to another location, and then let go of the mouse button. All images which intersect the rectangle drawn will be selected.
The image boundary for each image selected is displayed on the view. Note that image boundaries are drawn using different colors based on satellite type. The number of selected images is displayed on the status bar at the bottom left corner of the window.
Select
images (Selective)
Click to select images which intersect with point clicked or rectangle drawn.
This method of selecting images interactively is more selective than the method illustrated above. A certain fraction of the image must be present around the point clicked in order for that image to be selected. If a point very close to the edge or corner of an image is clicked, that image will not be selected. Likewise, when a box is drawn, that box must contain the center of the image in order for the image to be selected.
The image boundary for each image selected is displayed on the view. Note that image boundaries are drawn using different colors based on satellite type. The number of selected images is displayed on the status bar at the bottom left corner of the window.
Subset
images
Click to subset out images which intersect with point clicked or rectangle drawn.
This tool enables the user to quickly subset images from the currently selected set. Simply click inside an image boundary on the display to select just those images. There must be images already selected and their boundaries displayed on the view in order for this tool to work. If the user clicks outside all the image boundaries, no images will be selected.
Add
Thumbnails
For each image selected, add it’s thumbnail to the view.
Click the Add Thumbnails button to quickly view thumbnail representations of the selected images. A highly degraded image will be displayed on the view for the purpose of quick viewing. Up to 100 thumbnails can be displayed at once. If more than 100 images are currently selected, a message box will alert the user. It may take a while to load and display the thumbnails. A status bar at the bottom of the project window indicates the progress. Landsat TM images are drawn first, followed by MSS, then SPOT. The drawing order allows the SPOT images to be drawn on top of TM and MSS. To quickly remove the thumbnails from the view, click the Remove Thumbnails and images button.
Add
Thumbnail
Choose the image from a list to add it’s thumbnail to the view.
The Add Thumbnail button allows the user to display a single thumbnail from the list of currently selected images. Within the list of images (for most images), the user can identify the image capture date and the path/row. To quickly remove any thumbnails from the view, click the Remove Thumbnails and images button.
Add
Full-Res image
Choose the image from a list to add it to the view.
The Add Full-Res image button displays a list of all the selected images that are currently online. Choose the image you wish to display, then click the OK button. Remember that some of these images are quite large, and may take several minutes to display (especially Landsat TM). Use this button only when it is necessary. Use the Remove Thumbnails and images button to quickly remove any full-resolution images. You may remove images in this manner, even while they are being drawn.
Remove
Thumbnails and images
Clear out all thumbnails and images from the view.
Once you are finished viewing any thumbnails or images, use the Remove Thumbnails and images button to quickly remove all thumbnails and images from the view. You may remove images in this manner, even while they are being drawn.
Reset
Main View
Return the view to default condition.
Click this button to remove all thumbnails and images from the view, clear the selected set of images and remove the image boundaries from the view, to unselect any selected counties, and to return the display extent to default. This is the same condition as when the project is first opened.
Clone
Main View
Create a clone of the main view.
To duplicate the main view for purposes of comparing satellite images, click the Clone Main View button. This button creates a new smaller view which is zoomed to the extent of the image displayed. Subsequent cloned views are placed in one of four positions on the screen. The cloned view gets its name from the name of the image being displayed. If multiple images are displayed, the top-most image becomes the name of the view. At least one thumbnail must be displayed in the view for a cloned view to be created, or the user is alerted. An unlimited number of cloned views may be created, so use the Delete Cloned Views button periodically to remove them.
Delete
Cloned Views
Remove all cloned views from the project.
Use the Delete Cloned Views button to periodically remove all cloned views from the project. Too many cloned views will take up system resources and slow down the project.
Rename
Cloned View
Enter a new name for a cloned view.
By default, cloned views are named after the top-most image being displayed inside the view. The user may quickly rename any of the cloned views in the project.
Activate
Cloned Views
Bring all cloned views to the front of the display.
All cloned views that are closed, minimized, or behind the main view will be brought to the front of the display. Use the Activate Cloned Views button to quickly view all cloned views in the project.
List
Thumbnails
List all selected thumbnail images.
For each image selected, this script will list each thumbnail path and filename. The user is alerted if there are no images selected. This script is identical to the Add Thumbnail script, except you cannot add a thumbnail from the list.
List
Selected Counties
List all selected counties.
Sorts and lists in alphabetical order all the counties that are currently selected. The user is alerted of there are no counties selected.
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