Engineer should keep many records and data from field surveying/inspection. A lot preparation needed for the job, packing camera, map, papers and pen in the bag. However they must be passing an important moment, which scene never be back, because bringing out them at the moment is just hard. Here you are, what you need to have priority no.1, necessary one!
Now how to keep the information?  Simple! Take photo! that's all. 
Date/Location/Title/Serial Number saved automatically. You can choose any of item to revise when you convenient, including detail description. 
The photos can be sent to Photos Album for using in a variety ways plus information!

Also, like a traverse topographic survey, you can draw a path line with selected locations onto the map screen. If you choose two points only to draw a path, then the distance between two locations will be shown on the map.

Engineer, inspector, tourist, food maker, entertainer and broadcasting agencies must keep Survey Notes in hand, to keep record.
This provides most functions that they need, even which is sometimes simply impractical not to keep a record.

What is surveys:

1. To Provide a Benchmark
A "snapshot" of your target helps you to establish a baseline from which you can check work/project plan comparing whether target and environments

2. To Revise Any Deficient

3. To Provide An Opportunity To Discuss About Further Work
Communicating with client about your survey topic allows for deeper insight into your survey problem, and can shed light on topics related to your survey problem within a larger context.

4. To Prioritize Actions Plans Based on Youe Data
Rather than relying on subjective "gut" feelings, you can gather objective information to make sound data-driven decisions. Therefore, you can immediately address issues that are important, rather than wasting resources on things that no one cares about.