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An overview of the Prepare toolset
The Prepare toolset contains tools designed to import pipeline and ancillary data, such as structure and qualifying area features, into a Gas HCA Tool project geodatabase. The Prepare toolset also contains tools that process and prepare derivative data for use in Class Location and HCA-MCA analysis.
| Tool | Description |
| Calculate Influence Ranges | Calculates the ‘influence ranges’ of Buildings Intended for Human Occupancy (BIHOs) and Qualifying Areas/Buildings on the centerline in preparation for ‘sliding range’ calculations subsequent to Class Location determination (per 49 CFR §192.5). |
| Copy Centerlines | Copies centerline features from your pipeline database into the Gas HCA Tool project geodatabase. |
| Create Centerline PIR Buffers | Creates Potential Impact Radius (PIR) buffers on your centerline features in preparation for HCA-MCA analysis by method 2 (per 49 CFR §192.903(2)). |
| Create Structure and Site PIR Buffers | Creates PIR buffers around BIHOs and Identified Sites, and calculates the intersection ranges of those buffers with your pipeline centerline features in preparation for HCA-MCA analysis by method 2. |
| Generate Sliding Ranges | Calculates ‘sliding ranges’ for BIHOs in preparation for Class Location calculations. |
| Initialize Database | Instantiates the Gas HCA Tool project geodatabase. |
| Prepare Centerline Buffers | Generates 660-foot Class Location unit corridor and 300-foot corridor buffers around your centerlines for selection of BIHO features and Qualifying Area/Building features, respectively, in preparation for Class Location calculations. |
| Prepare Cluster Buffers | Generates dissolved ‘cluster’ buffers for BIHOs in preparation for calculating Class 4 and ‘clustered’ Class 2 and 3 location ranges (per 49 CFR §192.5(c)). |
| Prepare Pipe Segment and MAOP Features | Copies pipe segment and Maximum Allowable Operating Pressure (MAOP) data from your pipeline database into your Gas HCA Tool project geodatabase in preparation for PIR calculation and subsequent HCA-MCA calculation. |
| Prepare Qualifying Areas | Copies Qualifying Area/Building and/or Identified Site features from your pipeline database into the Gas HCA Tool project geodatabase in preparation for Class Location/HCA-MCA calculations. |
| Prepare Roads | Copies road centerline features into your Gas HCA Tool project geodatabase and prepares them for use in MCA calculations. |
| Prepare Structure and Site Buffers and Segments | Creates BIHO and Qualifying Area/Building buffers, and calculates the intersection ranges of BIHO buffers with your pipeline centerline features in preparation for Class Location analysis. |
| Prepare Structures | Copies BIHO features from your pipe database into the Gas HCA Tool project geodatabase and prepares them for use in Class Location and HCA-MCA calculations. |
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