SWMM Comparison App

BETA

Sections

Run a comparison to see sections.

Added Removed Changed Show Differences

MAP VIEW

Nodes Subcatchments Conduits

Run Comparison

Select Input Files

Choose First .inp

No file selected

Choose Second .inp

No file selected

Conduit Length Junc Invert Conduit Offset Junc Max Depth Roughness Subcatch Area Subcatch Width

Details

Only show changed

Help

1. Getting Started

Click Run Comparison to open the setup dialog.
Select two input files (.inp or .txt).
(Optional) Expand Tolerance Options to ignore minor differences.
Click Compare Files to generate the report.

2. Navigating Results

Use the Sections sidebar to switch between data tables (e.g., Junctions, Conduits).
Filter Buttons (top toolbar) show/hide Added, Removed, or Changed items.
Use the Search bar to find specific element IDs.
Double-click any row (or click the Details icon) to see a full field-by-field comparison.

3. Using the Map

Elements are colored by status: Green (Added), Red (Removed), Orange (Changed).
Use the Map View Mode dropdown (top of map) to focus on specific changes.
Click an element on the map to see its status and changes popup.
Toggle Labels to see element IDs at high zoom levels.

4. Export & Save

File > Save Session: Saves your current comparison to a .sca file to reload later.
File > Export Excel: Downloads a detailed .xlsx report of all differences.
File > Export Shapefile: Generates GIS files for the added/removed/changed elements.