Importing Layer Symbology into ArcGIS Pro for Landscape Burn Probability outputs

IFTDSS uses a specific color scheme for Map Studio and report figures. When you download IFTDSS files for use in ArcGIS Pro, you can duplicate this color scheme using our .lyrx files contained in the "Symbology_ArcPro" folder. The .lyrx file contains all the color specifications used by IFTDSS.

Lyrx files in the Landscape Burn Probability package include:

• Conditional Flame Length (ft)
• Integrated Hazard
• Midflame Wind Speed (mph)
• Proportion of Flame Lengths
• 1-hr Fuel Moisture
• 10-hr Fuel Moisture
• 100-hr Fuel Moisture

In the Landscape Burn Probability (LBP) download package available in IFTDSS, we include a folder entitled "Symbology_ArcPro." The symbology folder contains ArcGIS Layer (.lyrx) files to define the symbology for most of the layers visible in Map Studio for use in ArcGIS Pro. In the GeoTIFF, the LBP layers are both categorical and continuous data, therefore importing the symbology is slightly different for the two types.

Although Burn Probability is visible in Map Studio, we have not included an ArcGIS Lyrx file because the bins are dynamically derived on the Analysis Maximum and it is not possible to create a file for individual model outputs. We have included the steps required to change the symbology within ArcGIS Pro manually.

Importing symbology for Integrated Hazard

The Integrated Hazard layer in the LBP GeoTIFF is categorical data. The following steps outline how to import the symbology for categorical data.

1. Openan ArcGIS Pro session and add the layers you would like to map. For more information on how do add layers to ArcGIS Pro see the Opening an IFTDSS Geo Tiff file in ArcGIS Pro topic.

2. Right-click the “Integrated Hazard” layer and click Symbology.

   

3. In the Symbology pane, go to the Primary Symbology drop-down and select "Unique Values." You may get a pop-up window asking if you would like to compute unique values. Click Yes.

   

4. Click the Options icon toward the top right of the Symbology pane. In the drop-down that opens, click "Import from layer file". This opens the Import Symbology browse window. Select the "Integrated Hazard.lyrx" file located in the "Symbology_ArcPro" folder of your IFTDSS download package, and click OK.

   

5. Now you can see the Integrated Hazard layer in ArcGIS Pro is the same as it is in IFTDSS Map Studio.

   

Applying symbology for 1, 10, and 100 Hour Fuel Moisture, Conditional Flame Length, Midflame Wind Speed, and Proportion of Flame Lengths

The same steps are completed to import the symbology for 1, 10, and 100 Hour Fuel Moistures, Conditional Flame Length, Midflame Wind Speed, and Proportion of Flame Lengths. These data sources are continuous data that are classified into distinct bins. The following steps outline how to import the symbology for continuous data. The example below will use Conditional Flame Length; however, the same steps are applied to the remaining layers.

1. Open ArcGIS Pro session and add the layers you would like to map. For more information on how do add layers to ArcGIS Pro please see the Opening an IFTDSS Geo Tiff file in ArcGIS Pro topic.

2. Right-click the “Conditional Flame Length” layer and click Symbology.

   

3. In the Symbology pane go to the Primary Symbology drop-down and select "Classify."

   

4. Click the Options icon toward the top right of the Symbology pane. In the drop-down that opens, click Import from layer file. This opens the Import Symbology browse window. Select the "Conditional Flame Length (ft).lyrx" file located in the "Symbology_ArcPro" folder of your IFTDSS download package, and click OK.

   

5. Now you can see Conditional Flame Length in ArcGIS Pro is the same as it is in IFTDSS Map Studio.

   

Applying Symbology for Burn Probability

For Burn Probability, because the legend is dynamically applied to each model output based on the analysis maximum burn probability value, there is not a Lyrx file included in the download package. The steps below walk-through the process of classifying your Burn Probability in ArcGIS Pro using the same break values used in IFTDSS, and setting the color ramp to the same values for those classifications.

1. Open an ArcGIS Pro session and add the layers you would like to map. For more information on how do add layers to ArcGIS Pro, please see the Opening an IFTDSS Geo Tiff file in ArcGIS Pro topic.

2. Right-click the "Burn Probability" layer and click Symbology.

   

3. To determine the break values for the classification, the Burn Probability must be divided in five equal intervals representing 20%, 40%, 60%. 80%, and 100% of the maximum. The maximum burn probability value can be viewed in ArcGIS Pro by right clicking the Burn Probability layer, and selecting Properties>Source>Statistics. Alternatively, this value is also listed along with Burn Probability in the IFTDSS Map Studio Layer List and is referred to as the "Analysis maximum". In this example, it is rounded to 0.0747 in IFTDSS, and 0.074720673 in ArcGIS.

   

4. To determine the Upper values, or breakpoints, for each class, multiply the analysis maximum by 0.2 for 20%, 0.4 for 40%, and so on. In the table below, we've calculated these values for our example analysis maximum of 0.0747

   Upper values for 20, 40, 60, 80, and 100% of the Analysis maximum.

   Analysis maximum * percent	Break point
   0.0747 * 0.2 =	0.01494
   0.0747 * 0.4 =	0.02988
   0.0747 * 0.6 =	0.04482
   0.0747 * 0.8 =	0.05976
   0.0747 * 1.0 =	0.0747

5. In the Symbology pane go to the Primary Symbology drop-down and select "Classify."

   

6. In the Symbology pane, set Method to "Equal Interval" and Classes to 7.

   

7. In the Upper Value column, starting with the bottom row, left click each cell and populate the values to correspond with 100, 80, 60, 40, and 20% of Analysis maximum. Set the second row from the top to "0" and the top row to -1, similar to the example below.

   

8. In the label column, rename each row to correspond to the labels given in IFTDSS, as seen in the image below.

   

9. To match the colors, left-click the color swatch in the top row to open the color pallet. Select Color Properties at the bottom of the menu to see the color properties and set the RGB color values R = 156 , G = 156, B = 156, and click OK.

   

10. Repeat the process for the remaining classes using the table below.

    RGB Value for each class.

    Value	R	G	B
    -1 (Non burnable)	156	156	156
    0 (Burnable but not Burned)	0	0	0
    Lowest (0-20% of maximum)	41	219	255
    Lower (20-40% of maximum)	135	255	187
    Middle (40-60% of maximum)	250	250	100
    Higher (60-80% of maximum)	250	138	52
    Highest (80-100% of maximum)	232	16	20

11. Now you can see the Burn Probability layer in ArcGIS Pro (top image) appears the same as it is in IFTDSS Map Studio (bottom image).