3D Analyst Visualization with ArcGlobe. Brady Hoak, ESRI DC

Transcription

1 3D Analyst Visualization with ArcGlobe Brady Hoak, ESRI DC

2 3D GIS Viewing geospatial data in 3D leads to new insights 2D 3D Sometimes you need to edit your data in 3D 2D 3D Some problems can only be solved in 3D It is powerful to share and present your data in 3D 3D

3 ESRI Solutions for 3D Mapping & Visualization Out-of-the-box Desktop, Engine and Server solutions Desktop: ArcGIS 3D Analyst (ArcGlobe and ArcScene), 3D Analysis geoprocessing tools in ArcMap ArcGIS Explorer (available as Free Download) ArcReader ArcGIS Engine Solutions ArcGIS Server Solution: Globe Server Allows analysts to publish rich GIS web Services No programming required

4 ArcGIS Provides a complete system for 3D GIS Your GIS information in 3D

5 Visualize GIS in 3D City planning Civil engineering Visualize Facilities management Defense / Public Safety Natural resources Providing 3D insight into your information

6 3D City Visualization Add a Topographic basemap Streets Shaded Relief Vegetation Labels Buildings Map Template Resource Center Topographic basemap

7 3D City Visualization Add Imagery Sources of imagery - Pictometry Imagery from ArcGIS.com For managing large amount of data, ArcGIS Server Image Extension

8 3D City Visualization Add Elevation Elevation Globes from ArcGIS.com Managing elevation information - Terrain Data Set

9 3D City Visualization Add Buildings Extruded Buildings Textured Buildings Sources of textured buildings - Pictometry Building your own multipatch buildings

10 Data Collection Elevation Types of Data Imagery Subsurface Models and Multipatches Topographic Additional Features Local Across Scales Regional Global

11 DEMO Visualization - 3D Virtual City 3D Data in ArcGlobe elevation, imagery, local and services based data, trees and 3D symbology, textured buildings Sharing via ArcGIS.com as a layer package and as an animation

12 Sharing 3D Information Interactive 3D Mapservices on ArcGIS.com using your ArcGIS Server TerraGO 3D GeoPDF Share Video Animations, screen exports Layer Packages on ArcGIS.com Communicating GIS using 3D

13 Lyr Package from ArcGlobe - Share at ArcGIS.com

14 Manage 3D Information City planning Civil engineering Manage Natural resources Facilities management Defense / Public Safety Create, Build, and Manage GIS in 3D

15 3D Editing The 10 editing environment is now available in 3D - ArcScene - For localized, precision edits - ArcGlobe - For sketching / feature placement globally Supports standard editing capabilities - Feature Templates, Delete, Undo / Redo, Attribute edits, Relationship classes, etc Allows 3D geometry edits - Create vertical lines - Classic snapping is available - Move, rotate, scale, and replace feature geometry

16 DEMO - Managing 3D GIS Data - 3D Editing Editing in 3D - Underground Subway Entrances and Stairways showing template based editing and feature snapping

17 NOTE EXPANDED FROM ORIGINAL TALK THIS NEXT SECTION ON 3D BULDING CREATION IS AN ENHANCED VERSION OF THE PRESENTAION WITH MANY MORE SLIDES (DIRECTORS CUT)

18 Overview of Steps for Creating a 3D Building 1. Convert ArcGIS Footprint to Sketchup 2. Research Building Measurements 3. Model building shape in Sketchup 4. Create building textures in GIMP 5. Replace ArcGIS Multipatch Geometry with New Model

19 Convert ArcGIS Footprint to Sketchup 1. Extrude 2D Footprint to 3D Layer in ArcGlobe 2. Convert to Multipatch 3. Convert to Collada 4. Import Collada into Sketchup

20 Digitize 2D Footprint in ArcMap using Imagery Its highly recommended to use a coordinate system that has the same units for X, Y, and Z (ie a UTM zone with Z s in meters) Imagery can be used as reference Note In ArcGIS 10, now could also edit in 3D in ArcScene or ArcGlobe For multiple buildings, keep them as separate features in the same featureclass

21 Add 2D Polygon to ArcGlobe

22 Set Symbology to Extrude by a Height in Meters Ideally, if you already know the building or number of floors you could use that as a reasonable approximation

23 Use Layer to 3D Feature Class Tool The output Feature Class should be in a FGB

24 The Result is a New Multipatch This creates a multipatch type of Feature Class, which is a true volumetric shape

25 Tip for seeing the new Multipatch if it Isn t Visible Go the layer type view in the ArcGlobe Table of Contents and change the type for the new multipatch to draped. Right click on the multipatch and refresh it it should now appear. It will look just like the extruded polygon. Note we will edit this multipatch later.

26 Use Multipatch to Collada Tool The output is a folder containing a kml pointer to a dae collada model Check off Prepend Source Name to make the collada name easy to understand

27 About Collada Files (.dae file) Collada is the 3D format compatible with Google Earth and Google Sketchup They can be opened, edited, and exported with Google Sketchup Textures can be added to them They can replace an existing multipatch within a 3D Edit session in ArcGlobe Many.KMZ files are of 3D buildings that are zipped containers with a.dae file inside

28 Open Sketchup 8 and Import the Collada Model Use file Import - dae In Sketchup use File / Import to bring it in.

29 If you Get an Error, Click Past it

30 The Result is a new Sketchup Model It is actually a single component (a sketchup concept) The faces are colored black by default

31 Explode The Model and Color the Faces Right click the component to select it, and choose explode so you can edit the faces Use the paint bucket tool to color each face white so you can see them

32 Research Building Measurements 1. Gather Oblique Imagery, CAD drawings 2. Determine heights of floors, number of floors, roof and first floor heights 3. Decide on which 3D building block primitive shapes you will need for the most basic structure

33 Example CDC Building in Atlanta in BING This is a CDC building in Atlanta that we will model BING oblique imagery is used as a guide

34 Understand our Building Better We need to determine the real world size of the building - We knows the XY footprint already - Need to know Z height of each section We need to understand the 3D shapes that come together to comprise the shape - Arches - Towers - Tunnels - Roof Variations - Ledges - Overhangs Each surface can be a different texture - Concrete - Window - Metal

35 Understand Building Heights in Relation to Floors Office Residential/hotel Mixed-Use floor-to-floor height (f) Entrance lobby level floor-to-floor height 3.9m 3.1m 3.5m 2.0f = 7.8m 1.5f = 4.65m 1.75f = 6.125m Number of mechanical floors above ground (excluding those on the roof) s/20 = One mechanical floor every 20 stories s/30 = One mechanical floor every 30 stories s/25 = One mechanical floor every 25 stories Height of mechanical floors 2.0f = 7.8m 1.5f = 4.65m 1.75f = 6.125m

36 Understand Floor Makeup Appears to be 10 normal floors, suspended over a two story ground level floor, with a few rooftop structures above

37 Another Building Example - Look at Oblique Imagery to See Floor Makeup 5 Floors Appears to be 5 normal floors, suspended over an unusual ground level floor, with substantial rooftop structures above

38 Rotate Oblique Imagery to Learn More Entry Floor looks to be of same height compared to other five floors Roof Structure appears to be about two floors high at highest point of curve

39 Research the Building Type and Determine Heights For Example Floor Height 5 floors - 5 * 3.9 Entry Level 1 floor 1 * 3.9 m Roof Height 2 floors 2 * 3.9 m In sketchup create construction lines (Sketchup concept) to show height breakpoints

40 Look at all Sides to Understand Geometry and Slices to Create in Sketchup

41 Model building shape in Sketchup 1. Learn how to use Sketchup, especially the strategy of using components, using construction lines, extrusion, and inferring. There are many instruction videos on the sketchup website. 2. Extrude and create building using separate components using correct heights and distances for realism 3. Assemble components into the final building

42 Finished Model (non textures)

43 Create building textures 1. View Imagery to determine non-solid surface patterns 2. Color all solid surfaces with the Paint tool 3. Create custom textures for special surfaces in GIMP 4. Position and scale custom textures to faces in sketchup

44 Assign Appropriate Solid Colors to All Faces

45 Identify as few Custom Textures as Needed This building example only needs one texture for a green /gray modern window. It is drawn in GIMP by hand and inferred from a section of the building photo. This is a preferable method to photo draping for stylized buildings. Reality is simplified and cartographically presented. The file size is also smaller. BING Imagery

46 The Final Model with a Window Texture This building took roughly 3.5 hours to model the shape, and a half hour to design the single custom texture. The modeler was an intermediate sketchup user who had made other buildings in the past. This building is distinct enough to model in detail, and a city of one million people might have such buildings to create.

47 Final Model Rear View BING Image of rear

48 Replace Multipatch Geometry with New Model 1. Save as Collada File (Sketchup 6 is also supported) 2. Replace multipatch with Collada in an ArcGlobe edit session

49 Export the Sketchup Model as a new Collada File Use Export / 3D Model to.dae collada format

50 Start Editing in ArcGlobe Start an Edit Session in ArcGlobe and choose the Multipatch we created earlier to edit Click on the Edit Placement Tool..

51 Select the Model with the Edit Placement Tool

52 Choose Replace Model from the Editing Toolbar

53 Replace the Model 1. Choose the Collada Model.dae file The centroid of the imported model is used to position the new (imported / updated) feature geometry, so if the user changes the overall footprint of the model in SketchUp (eg: they add a new wing, or a garage) then they will see the model jump or move when the import the new model. Users will then need to interactively move the feature to its correct position. The Replace model action is undoable within the edit session, so users can always undo the import (or not save their edits).

54 Replace the Model cont. 2. Stop Editing, Save 3. Refresh the model (right click on layer) and you will see the textures. All done! The textures will disappear

55 Option Share on ArcGIS.com as a Layer Package Right Click on the Layer in the Table of Contents to Share as a Layer Package on ArcGIS.com Others can then find it on ArcGIS.com, download it, and use it in ArcGlobe or ArcGIS Explorer

56 Here is Our Layer Package Loaded in another users ArcGIS Explorer after Finding it on ArcGIS.com

57 DEMO - Managing 3D GIS Data - 3D Building Creating a 3D textured building from scratch using a footprint and oblique imagery from BING

58 LIDAR and Terrains

59 Terrain Dataset A Terrain is a multi-resolution surface created from measurements stored in feature classes Typical applications: - Topographic mapping - Bathymetric mapping Typical data sources: - Photogrammetric data - Lidar - Sonar

60 Motivating Forces Scalability - Large collections of mass point data (lidar) have been a problem Data integration - Many organizations are charged with keeping accurate and up to date topographic/bathymetric surfaces Data management - Terrains offer database oriented solution for managing source data from which these surfaces are derived

61 Limitations to Overcome TINs have an effective limit of 20 million points - It s recommended not to go over 3-5 million Updating TINs relative to edits of source data is difficult - They are disconnected Rasters are derivative - Difficult to update without rebuilding from source data

62 LAS Data in ArcScene MT St Helens

63 What are Terrain Datasets? Terrain datasets live inside feature datasets within the geodatabase Identify which feature classes participate and how they contribute Rules specify how features are used to define a surface

64 Multi-Resolution Surface Model Points and Breaklines Terrain Pyramids Thinned Point Set Full Resolution Multi-resolution terrain dataset (TIN structure)

65 Implementation Levels of Detail TIN surface generated on-the-fly for given area of interest and level of detail Supports point, multipoint, polyline, and polygon based features Seamless Fast Scalable

66 Implementation - Tiling Data is structured, internally, into tiles Spatial coherence and tiling (point clustering) Each tile contains a manageable amount of data Facilitates processing large amounts of data Z tolerance and vertical indexing Measurement update and dirty-areas Localized processing

67 Interactive Surface Analysis Interactive surface tools 3D Analyst toolbar in ArcMap

68 Geoprocessing with Terrains Geoprocessing with Terrain Datasets - Terrain Management toolset - Creation - Modification - Data conversion toolset - Data loading - Surface conversions - Terrain and TIN Surface toolset - Analysis conducted directly on terrains

69 Analysis Capabilities for Terrain Datasets QA/QC lidar data DEM / DSM creation Slope Aspect Contours Surface differencing Intensity image generation Estimating Forest Canopy Data area delineation Thinning / reducing noise Spot interpolation Profiling

70 DEMO - Hydro Enforcement Demo with a Terrain

71 DEMOS - Visualization of 2D data in 3D Extruded polygons by attribute Court Bankruptcy Cases 3D Surface for 2D Density Traffic in Virginia

72 Final Demo - Using our Shared Content with AGX My content from today all added back into ArcGIS Explorer (AGX) from ArcGIS.com User content (Everest) from ArcGIS.com

73 Further Resources Please visit the Esri Resource Center for more information at and click on 3D GIS

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