Lesson 4 of 6 · Public services and scientific value
Identify benefits without confusing them with revenue
8 minute lesson · 3 checks along the way
Your goal for this lessonEvaluate public services and scientific value using explicit beneficiaries and comparison cases.
In this lesson 3 sections · 3 checks
Using archive links & definitions
Follow a linked name to explore its archive card. “Back to your lesson” brings you to the same part of the reading.
Words with a dotted underline open a short definition right here in the lesson.
Read & understand
A useful result need not produce a ticket sale
Weather observations, navigation signals, environmental records and scientific discoveries can support activities beyond the organization that funds a mission. Their value may appear as improved decisions, avoided losses, research capability or access to information. A free dataset can therefore have value even when its download price is zero.
Landsat provides a concrete example: its observations support uses such as land and water management. USGS economic studies estimate benefits to defined user populations using stated methods. An estimated social benefit is not the same as cash received by the agency or a guaranteed return to every taxpayer.
Check 1 of 3
10 pointsUse the reading above. You can try again without losing points.
Read & understand
Ask what would happen without the service
A benefit estimate needs a : the plausible situation without the project or with the best alternative. If a user could obtain similar information elsewhere, attributing the whole outcome to one satellite may overstate its additional contribution. Conversely, a unique long record can support questions that a single replacement image cannot.
In a fictional flood-mapping case, faster information helps responders allocate resources. Evaluate the chain from observation to usable product to decision. A satellite image alone does not demonstrate that every claimed loss was avoided, because communication, local capacity and other conditions also affect the result.
Landsat 7 observations of Los Angeles are combined with Shuttle Radar Topography Mission shaded relief in this regional context product. The image illustrates information that can support analysis; it does not by itself measure an economic benefit, prove a particular decision changed or establish current road conditions.
Look closely
What evidence would connect this kind of data product to a claimed public benefit?
See what to notice
Documented use, the decision it informed and a credible comparison without the information would help assess the contribution. The image alone does not establish a monetary return.
Check 2 of 3
10 pointsUse the reading above. You can try again without losing points.
Read & understand
Show who benefits and who bears costs
A total can conceal unequal access or effects. Users with software, expertise and reliable connectivity may benefit differently from those without them. Open access removes a price barrier but does not automatically remove every practical barrier to using the information.
Scientific value can include new questions, tested theories and data reusable by future investigators. Some benefits resist a confident monetary estimate. A responsible evaluation can combine quantitative measures with clearly stated qualitative goals, while avoiding double counting the same outcome under several labels or pretending that uncertainty makes every claim equally plausible.
Check 3 of 3
10 pointsUse the reading above. You can try again without losing points.
Put it together
Your lesson progress
Each check connects to a part of the story. Complete all 3 to earn your 25-point lesson bonus.
Explore further · Optional
Go to the source
Explore the evidence behind this lesson. These optional readings and videos open in a new tab.
- Read: USGS: economic valuation of Landsat imageryThe study’s valuation method and user population matter; estimated benefit is not agency revenue.
- Read: USGS: everyday uses of LandsatCompare the explanation and its assumptions with the worked example in this lesson.
- Read: GAO: cost estimating and assessment guideCompare the explanation and its assumptions with the worked example in this lesson.