Get3D Knowledge Center

04 City Modeling Case Studies

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Case Studies: Large-Scale 3D City Modeling

Get3D has successfully delivered city-level 3D reconstruction projects with measurable outcomes across multiple applications.

Aerial Triangulation at Scale

Guangzhou City (middle area) — 657,615 Images

ParameterValue
Area75 km²
Image Count657,615
Image Resolution6000 × 4000
GSD2 cm
Number of Blocks20
Number of Engines9 (64 GB RAM each)
Total AT Time64.3 hours

No single high-memory machine was required to solve the complete Aerial Triangulation. Dynamic block partitioning across 9 standard-memory nodes was sufficient.

Guangzhou AT project

Million-Photo Project — 925,636 Images

ParameterValue
Area82 km²
Image Count925,636
Image Resolution9504 × 6336
Ground Resolution1.5 cm
Node Count30
AT Time16 hours 46 minutes

925,636 image project

Million-Photo Project — 320,055 Images

ParameterValue
Area35.06 km²
Image Count320,055
CamerasSony ILCE-7RM2, Riebo DG6Pros
Node Count10
AT Time17 hours 34 minutes

320,055 image project

Large-Format Aerial Survey — 527,925 Images

ParameterValue
Area550 km²
EquipmentManned Aircraft + Phase One
Node Count10
AT Time24 hours 46 minutes

527,925 image project

High-Speed Processing — Standardized Test Environment

Test Environment: One 10-node Get3D Farm (Intel Xeon® E-2378 | NVIDIA GeForce RTX 3080Ti | 128 GB DDR4 per node)

Case 1Case 2Case 3
Area74.1 km²10.9 km²11.5 km²
Image Count35,26652,35050,030
Image Resolution100 MP42 MP24 MP
Ground Resolution5 cm2.5 cm3 cm
AT Time1.9 h2.1 h1.2 h
Reconstruction Time27.6 h10.3 h8.5 h

Case 1 result Case 2 result Case 3 result

Heritage Site — Yungang Grottoes

ParameterValue
Image Count283,400
Raw Data Volume15.1 TB
Triangle Count880 million
Main Cave DimensionsLength 11 m × Width 9 m × Height 13.6 m
Subsidiary Caves37
Buddhist StatuesMore than 2,990

Yungang Grottoes heritage site

Source: Get3D Knowledge Center

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