Free drone mapping software can be a sensible choice, especially if you already have a capable computer and know how to use it. A free online plan can also be enough for occasional small projects. Whether either option saves you money depends on the work you need to complete.
When comparing a free mapping tool with a paid service, look beyond the subscription price. Include the time you spend setting it up, the equipment it needs and how you will get the finished survey to the client. A service that processes your photos for free may still charge for the download you need.
You do not need a complicated cost model to compare the options. A few notes from a typical project are usually enough to see where the main differences lie.
What does a free mapping tool include?
There are three common options, and it helps to keep them separate.
Software you install and run yourself. Open-source photogrammetry software gives you control over the processing environment. You provide the computer, storage and setup work. The software may be available at no charge, while an installer, hosting service or professional support is sold separately. Read the licence and the installation requirements for the version you intend to use.
A hosted free plan. The provider runs the processing, with limits on what the free account can do. These may include the number of photographs, available outputs, processing settings, downloads and how long projects remain accessible. Such a plan can be useful beyond evaluation if your regular jobs fit within those limits.
A trial. A trial gives you time or an allowance to test a product before paying. Check when it ends and whether it lets you export the results. It is useful for choosing software, but should not be treated as a permanent free service.
Where the costs usually come from
Learning and setup
With a new application, allow time for installation, learning the controls and finding settings that work for your usual photo sets. You may also need to establish a routine for checking results and preparing deliveries.
This is mostly an initial cost. If you expect to use the software for years, the time spent learning it may be worthwhile. If you need to finish one small job, several hours of setup can be harder to justify.
For a locally managed option, the OpenDroneMap documentation provides installation guidance, hardware recommendations and descriptions of the processing outputs. Use a typical dataset to check how the software performs on your equipment.
Your time during each project
Count the time you spend preparing files, starting jobs, resolving problems, checking the output and arranging delivery. Keep unattended processing time separate.
A three-hour run does not require three hours of paid attention if you can leave it running and do something else. It does matter if it prevents you from using your computer or makes you miss a delivery deadline.
The same applies to cloud mapping software. Uploads, queues and processing take time, even though the work runs on the provider's machines. Compare how long you have to wait and how much attention the job needs as two separate figures.
Equipment and storage
If your current computer can handle the work comfortably, there may be little additional hardware cost. Account for the extra storage and electricity, along with any upgrade the workload actually requires.
If you need to buy a workstation specifically for processing, include that expense over the period you expect to use it. For a computer shared with other work, allocate only a reasonable share to drone mapping.
Storage is easy to overlook. Photos, intermediate processing files and finished outputs can take up considerable space. Decide which files you need to retain and where you will keep a backup.
Getting the result to the client
Check the delivery requirements before choosing a plan. Does the client need a downloadable GeoTIFF, a point cloud, a report or simply a link to view the site?
A free account that lets you inspect a map may be sufficient for your own review, but unsuitable for a job requiring file exports. If an upgrade is necessary, include it in the comparison from the outset.
Also allow time for explaining the files and arranging access. A shared map can make this easier for clients who do not use specialist software. See sharing a drone map with a client for the practical details.
Trying MapperTool on the Free plan
MapperTool offers an ongoing Free plan that does not require a payment card. The documentation lists orthomosaic, DSM, DTM and point cloud outputs across all plans. NDVI and thermal require Pro, while high processing settings require Plus or Pro.
Before starting a client job, check the current photo allowance, download permissions and project access period. The pricing documentation explains the differences and points to the current limits.
The Free plan gives you a way to try the processing and viewer with your own images. If you need a paid feature, test the rest of the process first and include the relevant plan in your estimate.
How to compare the options on your own data
Use a photo set similar to the jobs you normally deliver. A small demonstration project may run well but tell you little about a larger survey with difficult surfaces or incomplete coverage.
Before you start, write down the outputs and file formats you need. Then record your working time from preparation through delivery. Note any problems that require intervention, and check that the final result meets the same requirements in each application.
Try opening the delivery as the client would. This can reveal a missing export option or an access restriction that was not obvious during processing. Check how you will retain the files if you stop using the service or the online project expires.
Keep the input data consistent too. Reducing overlap to fit a free photo allowance can leave you with a poorer survey, making the comparison less useful. The article on how many photos a drone map needs explains how overlap and flight height affect the image count.
For occasional work, an available free plan may be enough. For regular processing, compare the monthly cost using the time you actually recorded. If you already have a reliable local setup, there may be little reason to change; if processing and delivery take too much of your working day, a paid service may be worth considering.