Fresno Park Topographic Map - Datumate
Datumate Case Study

Fresno Park Topographic Map

Share on facebook
Share on twitter
Share on linkedin
Job TypeTopography project
CompanyQK Inc.
CountryCalifornia, USA
Project DateNov 2016
Project Size3404 m2 (0.84 acres)
DronePhantom 3
Pattern of flightOblique
Number of Images40
Accuracybetter than 5 cm (0.173 ft)
DatuSurvey savings1 field hour instead of 7 hours using conventional methods 6 office hours instead of 14 hours

Project Description

QK needed to survey a city Park in Fresno for the re-design of the wading-pool area.

The estimated effort using conventional surveying techniques was:

  • 7 field hours using Total Station
  • 14 office hours to create Topographic map

Data Acquisition

Acquiring images

DJI Phantom 3 drone with DatuFlyTM app was used, allowing for quick, precise and easy image capturing. Flight duration was 6 min in an altitude of 109 ft. (33m).

Resolution was 2.4cm/pixel.


Acquiring Ground Control Points

6 points were used as Ground Control Points.

6 additional points were used as Check Points, to detect the accuracy of the project.

Achieved Results

3D CAD model in DXF format was created. It included the area topography and park’s constructions that were generated by drafting directly on the images using DatuSurveyTM.

True orthophoto and dense point cloud were generated.

A point file, including names, codes, descriptions and coordinates of all new points was generated. Overall, more than 180 new points were drafted directly on the images.

The measurement accuracy of all the points was better than 5 cm (0.173 ft.) in 3D coordinates.

The results were exported to Civil3D software to create a Topo Map.

DatuSurvey Enterprise Outputs

True Orthophoto


Generation time: 30 min

Dense Point Cloud


Generation time: 15 min

Cad Data


Orthophoto with CAD data


Topo Map in Civil3D


See how your peers are using Datumate solutions...

A14 Road and Railway Intersection Surveying for SKANSKA

As part of the UK’s A14 improvement scheme which is one of the UK’s largest road projects, it was required to map a busy A14 highway junction including a highway intersection and a railway line. The complex mapping included multiple infrastructure layers (bridge, road and railway line) as well as an accurate snapshot of the surrounding buildings to avoid future damage claims during road reconstruction work.

Read this case study »

Quantity Check Surveying

Courts at Clarksburg is an area that is being prepared for building homes. The area surveyed is an open area where infrastructure work has been done. The objective of this project is to survey the area to check the level of filled slab areas in an effort to compare it to the planned levels. And also to check quantities of cut and fill needed to finish the prep work.

Read this case study »
residential surveying

Residential Community Surveying

The objective of this project is to survey a residential area and detect changes in structures for property taxation purposes. The area surveyed included about 50 houses which were clearly shown on an orthophoto and as a dense point cloud as well.

Read this case study »
Survey of Baseball Stadium

Baseball Stadium Surveying

Doppler radar is being implemented in baseball and softball venues around the world to track the trajectory of pitched and hit balls. All physical obstructions that are within the azimuth of the Doppler radar field of view were identified using the model.

Read this case study »
Scroll to Top