The following describes each formula included in the Imagery Formulas section of McIDAS-V.
Geolocate an Image (Upper Left Lat, Upper Left Lon, Lower Right Lat, Lower Right Lon - Takes an image data object and a lat/lon bounding box and adds a lat/lon domain to the data. This formula is commonly used in conjunction with another formula.
Input Parameter | Definition | |
Upper Left Lat |
Upper left latitude value (default=90). |
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Upper Left Lon |
Upper left longitude value (default=-180). |
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Lower Right Lat |
Lower right latitude value (default=-90). |
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Lower Right Lon |
Lower right longitude value (default=180). |
Image over topography - Obtains the latitude coordinate from the grid and returns a grid of the latitudes at each point.
Scale images to brightness ranges - Displays your selected parameter in the Main Display window. Instead of using the color bar range that would be customary for your selected parameter, the standard range for brightness values will be used (i.e. 0-255).
Three Color (RGB) Image - Combines three images as a RGB image. When you select Create Display, a Field Selector window will open. The fields in this window are red, green, and blue. Once you click OK, an RGB image will be created in the Main Display window.
Three Color (RGB) Image (Auto-scale) - Combines three images as a RGB image displayed over topography. When you select Create Display, a Field Selector window will open. The fields in this window are red, green, and blue. Once you click OK, an RGB image will be created in the Main Display window. After the display is created, you have the ability to change the ranges for the red, green, and blue values, as well as the gamma value.