Module 2- 3D Modeling for Design

Learning Obs:

  • 3D Projections & Visualization

  • 3D Modeling Tools

  • 3D Modeling Case Studies Using City Engine

3D Projections & Visualization

  • Review

    • ArcGIS automatically integrates datasets whose coordinate systems are known

    • this is NOT a good thing, you must always double check your projections

  • Data & Projectsions

    • In CityEngine, the scene coordinte system must be projected

    • In ArcGIS Pro, 3D data includes the data’s horizontal (XY) coordinate system & the vertical (z) coordinate system

      • a vertical coordinate system defines the orgin for height and depth values

        • Ellipsoidal - z values measures from perfectly symmetrical ellipsoid

        • Gravity-related - z values measures from an analytical surface that represents mean sea level

  • Vertical Coordinate System

    • Linear Unit of Measure is CRITICAL!

      • Linear: feet or meters

      • Example

        • mean low water →depth based VCS

        • mean sea level → height based VCS

    • Use Cases

      • Local

        • Water Wells

          • used for agriculture and land use

          • has to be drilled as appropriate depths

          • Use a gravity based VCS

        • Flood mapping

      • Global

        • GPS stations

        • Earthquakes

          • measuring the hypocenter you would need a depth based VCS

        • Weather

  • 3D Modeling Tools

    • 3D Libraries

    • Materials

    • Texture mapping: a method for defining high-frequency detail, surface texture, or color information on a computer-generated graphic or 3D model

  • In class: Procedural Modeling for Design

    • using CGA (computer generated architecture) used to improve our analysis with mapping

Use Case: Investigate Variations in Demographics

  • Estimate number of residents over time

    • examine variables qualitatively with live / interactive graphs and charts

  • 3D Renderings for Design

    • when there are too many surfaces, there are also too many verticies meaning the GPU will take longer to render

3D Modeling in GIS

Learning Obs

  • 3D spatial data storage & exchange

  • Creating and editing 3D GIS data

3D Spatial Data Exchange

  • Transform 2D and 3D GIS into a single GIS workflow

  • reuse dynamic services across clients (laptop or mobile device)

    • url linking

    • ex. surveying

  • Conduct analysis acrss real-time and historical data

  • Experience builder → build powerful 3D GIS apps without writing a single line of code

  • Dashboards → how they are designed is critical

  • ArcGIS Enterprise → Scalable 2D/3D enterprise content distribution & geoprocessing

  • Formats

    • Geoprocessing tool box is limited but that does not make a conversion you want to do as impossible

    • ex. instead of conversion sometimes we need to use a coding language

Creating and Editing 3D GIS Data