KeyTERRA-FIRMA Mainstream gives civil engineers powerful tools for terrain modelling, grading, and site design — all inside BricsCAD® or AutoCAD®.
Designed for civil engineers working on site design, infrastructure, and land development projects.
If you’re building terrain models, calculating volumes, or designing roads and drainage in CAD — KeyTERRA-FIRMA Mainstream gives you the tools to do it faster and more accurately.
See KeyTERRA-FIRMA in action in our →Shetland Islands Case Study
Build detailed terrain models from survey data for infrastructure and site design projects.
Create and control surface levels, grading plans, and slopes for accurate site design.
Perform volume calculations, slope analysis, and design checks to improve accuracy and reduce risk.
Advanced tools for terrain modelling, volume calculations, and site design — all inside your CAD environment.
Create triangulated terrain surfaces using breaklines, boundaries, and elevation data.
Calculate material volumes between surfaces with precision using multiple analysis methods.
Generate chainage, stationing, and alignment data for roads and infrastructure design.
Analyse terrain using slope bands, contours, and gradients to assess site conditions.
Design roads, car parks, and site layouts using alignment and grading tools directly in CAD.
Runs inside BricsCAD Pro and AutoCAD with native DWG support—no external viewers or file conversions required.
Simplify complex design workflows, reduce risk, and deliver accurate engineering outputs.
Build accurate terrain models with full control over surfaces and levels.
Use slope and volume analysis to improve site layout and drainage planning.
Understand material volumes clearly for cost control and compliance.
Create alignment-based designs and grading directly in CAD.
Automate chainage labelling and long section outputs. Ideal for roads, railways, or linear infrastructure design.
Work entirely in DWG with no exports or compatibility issues.
Choose the licence that suits you — annual subscription or perpetual with optional maintenance.
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We’re here to help! Explore our FAQ or reach out to us for more information!
Key questions about KeyTERRA‑FIRMA Mainstream. If you need more info, just reach out. We'll be happy to answer any questions you might have.
Mainstream includes all Base features plus Ground Modeling and 3D Site & Road Design modules. You can model surfaces, analyse slopes, calculate cut and fill, and design road and site levels—all inside your DWG.
You can choose either an annual subscription or a perpetual license with optional maintenance. We offer flexible pricing to suit how you work and your budget.
Mainstream is ideal for infrastructure, highways, residential developments, sports facilities, and any site requiring detailed terrain modeling and level design. It’s used by surveyors, engineers, and contractors across the world.
Yes. If you start with KeyTERRA‑FIRMA Base, you can upgrade to Mainstream at any time. We’ll credit the difference, so you only pay for the additional functionality.
Yes. Mainstream provides full terrain modeling, grading, volume calculations, and site design tools directly inside BricsCAD or AutoCAD.
We’ll review your requirements and confirm if a Proof of Concept is the right approach before getting started.
We’ll help you understand what’s active, where, and what to do next.
