QGIS for Network and Infrastructure Mapping & Visualization

What is QGIS?

QGIS (Quantum GIS) is a free, open-source Geographic Information System that allows you to create, edit, visualize, and analyse geospatial data. For network engineers and infrastructure managers, QGIS is an invaluable tool for mapping and planning physical network assets.

Why Use QGIS for Network Infrastructure?

• Free and open-source — No license costs (unlike ArcGIS)
• Cross-platform — Windows, macOS, Linux
• Powerful — Handles large datasets, supports 100+ data formats
• Extensible — 1000+ plugins available
• Print-ready maps — Professional map outputs for documentation

Use Cases

Fiber Optic Route Planning

[Central Office] ════ Fiber Route ════ [Cabinet A]
       ║                                    ║
       ║                               [Cabinet B]
       ║
  [Building 1]──splice──[Building 2]──splice──[Building 3]

Map fiber routes with:

• Cable paths (along roads, railway tracks, ducts)
• Splice point locations
• Manholes and hand holes
• Cable capacity (strand count) per segment
• Splice loss data per joint

Telecom Tower and Base Station Mapping

• Plot tower locations with coverage radius
• Visualize signal overlap and gaps
• Plan new tower placements
• Terrain analysis for line-of-sight calculations
• Population density overlay for capacity planning

Railway Infrastructure Mapping

• Track layouts and station locations
• Signalling equipment positions (signals, points, track circuits)
• Telecommunication cable routes along railway
• Equipment room locations
• Maintenance zone boundaries

Enterprise Network Documentation

• Building locations with WAN link details
• Cable routes between buildings
• Switch room locations
• WiFi access point placement (with coverage overlay)
• IoT sensor deployment maps

Getting Started

Installation

# Ubuntu/Debian
sudo apt install qgis qgis-plugin-grass

# Windows/macOS: Download from https://qgis.org

Creating a Network Infrastructure Map

Step 1: Add a Base Map

Use OpenStreetMap as your background:

1. Open QGIS
2. Go to Web → QuickMapServices → OSM → OSM Standard
3. Or install the QuickMapServices plugin first via Plugins → Manage Plugins

Step 2: Create Layers for Your Assets

Create vector layers for different infrastructure types:

Point layers:

• Equipment rooms / server rooms
• Towers / base stations
• Splice points
• Manholes

Line layers:

• Fiber optic routes
• Copper cable routes
• Microwave links
• WAN connections

Polygon layers:

• Building footprints
• Coverage areas
• Maintenance zones

Layer Panel:
├── Base Map (OSM)
├── Fiber Routes (line layer)
├── Equipment Rooms (point layer)
├── Splice Points (point layer)
├── Coverage Areas (polygon layer)
└── Cable Ducts (line layer)

Step 3: Add Attribute Data

Each feature can have rich attribute data:

Fiber Route attributes: | Field | Type | Example | |-------|------|---------| | route_id | String | FBR-001 | | cable_type | String | 48F SMF G.652D | | length_km | Float | 3.45 | | installation_date | Date | 2024-06-15 | | status | String | Active | | duct_id | String | DUCT-A12 |

Equipment Room attributes: | Field | Type | Example | |-------|------|---------| | room_id | String | ER-HQ-01 | | location | String | Building A, Floor 2 | | capacity | Integer | 12 racks | | power_kw | Float | 15.5 | | cooling | String | Precision AC | | contact | String | John Doe |

Step 4: Style Your Map

Use rule-based styling to visualize data:

Fiber Routes styled by capacity:
  - 96 fibers: Thick red line
  - 48 fibers: Medium orange line
  - 24 fibers: Thin blue line
  - 12 fibers: Thin green line

Equipment Rooms styled by status:
  - Active: Green circle
  - Planned: Yellow triangle
  - Decommissioned: Red X

Advanced Features

Buffer Analysis (Coverage)

Create coverage areas around towers or access points:

1. Select the tower layer
2. Go to Vector → Geoprocessing → Buffer
3. Set distance (e.g., 500m for WiFi, 5km for cell tower)
4. The result shows the coverage polygon

Route Length Calculation

Calculate total fiber route length:

1. Open the Field Calculator on your fiber layer
2. Add a field: $length (in layer CRS units)
3. Or use: Vector → Analysis → Sum Line Lengths

Heatmaps

Visualize density of equipment or faults:

1. Add your point layer (e.g., fault locations)
2. Change the renderer to Heatmap
3. Adjust radius and color gradient
4. This shows hotspots of frequent faults

Spatial Queries

Find all equipment within a certain distance:

-- Find all splice points within 100m of a reported fault location
SELECT * FROM splice_points
WHERE ST_DWithin(
    geometry,
    ST_MakePoint(78.4867, 17.3850),
    100
);

Print Layouts

Create professional maps for documentation:

1. Go to Project → New Print Layout
2. Add map canvas, legend, scale bar, north arrow
3. Add title and annotation
4. Export as PDF, SVG, or PNG

Useful QGIS Plugins for Network Mapping

| Plugin | Purpose | |--------|---------| | QuickMapServices | Add base maps (OSM, satellite, etc.) | | QFieldSync | Mobile data collection (field surveys) | | Profile Tool | Elevation profiles along cable routes | | QGIS2ThreeJS | 3D visualization of infrastructure | | Data Plotly | Charts and graphs from attribute data | | mmqgis | Geocoding, buffering, hub lines |

Integration with Other Systems

Export to KML/KMZ (Google Earth)

Right-click layer → Export → Save Features As → KML

GeoJSON for Web Maps

Right-click layer → Export → Save Features As → GeoJSON

Use the exported GeoJSON in web dashboards (Leaflet, MapboxGL).

Database Connection

Connect QGIS to PostGIS for shared, multi-user infrastructure data:

Layer → Add Layer → Add PostGIS Layer
  Host: db.example.com
  Database: network_gis
  Schema: public

Conclusion

QGIS is a powerful, free tool for mapping and managing network infrastructure. From fiber route planning to tower coverage analysis, it provides the geospatial capabilities that network engineers need — without the cost of commercial GIS software. Combined with field surveys, GPS data, and database integration, QGIS becomes a comprehensive infrastructure asset management platform.

Related: Network Topology Design and Optical Fiber Networking.