Chapter 19

GIS Ethics & Critical Geography

Responsibility in the age of big data. Explore how Critical GIS questions the power, privacy, and social impacts of mapping technologies.

At a Glance

Prereqs: None Time: 25 min read + 20 min scenarios Deliverable: Ethics checklist

Learning outcomes

  • Identify ethical risks in common GIS workflows (privacy, surveillance).
  • Explain the core tenets of Critical GIS and feminist geography.
  • Apply a "Do No Harm" framework before sharing sensitive spatial data.

Key terms

privacy, geoprivacy, critical GIS, data sovereignty, cartographic silence, redlining

Stop & check

  1. Why can point maps reveal sensitive information even without names?

    Answer: Locations can re-identify people or sensitive sites.

    Why: Spatial data acts as a unique fingerprint (the "mosaic effect").

    Common misconception: Removing the "Name" column makes data anonymous.

  2. What is "Cartographic Silence"?

    Answer: The intentional or unintentional omission of features/people from a map.

    Why: What is left off the map is often as political as what is included (e.g., informal settlements).

    Common misconception: Maps are objective mirrors of reality; they are selective representations.

Try it (5 minutes)

  1. Take one map you made previously and list 2 ways it could mislead a reader.
  2. Write one fix (aggregation, caveat, better legend).

Lab (Two Tracks)

Both tracks produce the same deliverable: an ethics review checklist completed for a chosen mapping scenario.

Desktop GIS Track (ArcGIS Pro / QGIS)

Pick a sensitive dataset (health, crime, endangered species) and draft a short share/not share decision with mitigation steps.

Remote Sensing Track (Google Earth Engine)

Critique a surveillance workflow. Write a reflection on the privacy implications of using high-res commercial imagery vs. open medium-res data.

Common mistakes

  • Publishing precise points for vulnerable populations.
  • Ignoring the history of the data (who collected it and why?).
  • Assuming "Open Data" means "Ethical to Use" without context.

Further reading: https://www.ucgis.org/site/gis-t-body-of-knowledge

⚖️ The Power of the Map

Maps are not neutral documents. They are instruments of power. Critical GIS is a subfield of geography that questions the underlying assumptions, biases, and socio-political impacts of geospatial technology. Who gets to map? Who gets mapped? And who is left off the map entirely?

🎨 GIS as an Art: The Art of Persuasion

Propaganda maps are masterpieces of manipulation. By subtly shifting a color ramp from "neutral blue" to "alarming red," or by choosing a projection that enlarges a threat, a cartographer can change public opinion without changing a single data point. Recognizing this artifice is the first step in ethical literacy.

🛡️ Ethics Simulator

What would you do? Choose the most ethical path.

Scenario: You are mapping disease clusters during an outbreak. The government wants you to publish a map showing the exact home addresses of the infected to "protect the public."

Geographic Inquiry: Asking Questions of Where

Before ever opening software, a GIS analyst starts with a question. "Where" is not just a coordinate; it is a relationship.

  • Concentration: Where is the phenomenon clustered?
  • Boundary: Where does it change sharply vs. gradually?
  • Uncertainty: Where is the data missing or biased?
  • Verification: Where would you stand on the ground to prove it?

Locational Privacy & Surveillance

In the age of smartphones, we generate a digital exhaust of location data every day. Geoprivacy is the right of individuals to prevent the disclosure of their movements. GIS professionals have a duty to practice "Location Masking" (geomasking) when dealing with human subjects to prevent re-identification.

Critical GIS: The Data Double

Every time you use a navigation app, you are creating a digital twin of yourself—a "Data Double." This shadow profile is sold to advertisers, insurance companies, and even data brokers. You might own your phone, but who owns the pattern of your life recorded by it?

🌎 Data Sovereignty & Indigenous GIS

For centuries, Indigenous communities were mapped by colonial powers — their territories divided, renamed, and claimed. Today, a growing movement of Indigenous GIS reclaims this power. Data Sovereignty is the principle that communities have the right to govern the collection, ownership, and application of data about their own people and lands.

CARE Principles

The CARE Principles (Collective Benefit, Authority to Control, Responsibility, Ethics) were developed by the Global Indigenous Data Alliance as a counterpart to FAIR data principles, centering Indigenous rights in data governance.

Counter-Mapping

Counter-mapping is the practice of communities creating their own maps to challenge official narratives, assert land rights, and document traditional knowledge that is invisible on government maps.

In Texas, the Tigua (Ysleta del Sur Pueblo) and Kickapoo Traditional Tribe have used GIS to document ancestral territories and support land rights claims. Globally, the Local Contexts initiative provides Traditional Knowledge (TK) Labels that can be embedded in GIS metadata to indicate Indigenous cultural protocols for data use.

♀️ Feminist GIS & Participatory Mapping

Feminist geographers like Mei-Po Kwan and Nadine Schuurman challenged the assumption that GIS is a neutral, objective tool. Feminist GIS argues that all spatial data reflects the values, biases, and power structures of those who collect and analyze it. It advocates for:

  • Incorporating qualitative data: Lived experiences, oral histories, and community knowledge are as valid as sensor data.
  • Participatory GIS (PGIS): Involving affected communities in the mapping process, not just as data subjects but as co-creators.
  • Reflexivity: Acknowledging the positionality of the researcher — who you are shapes what you map and how you interpret it.
Example: A city planner mapping "safe routes" for women at night would get very different results using official crime statistics vs. participatory mapping workshops where women draw their own perceived danger zones. Both datasets are "true" — but they tell completely different stories.

🎭 Regional Decisions: The Ethics of the Map

Scenario: You are a GIS analyst for a public health department in San Antonio. You have been asked to create a public-facing web map showing the locations of all active tuberculosis (TB) cases in the city to "help the public understand the outbreak."

Your task: Evaluate this request using the "Do No Harm" framework. Consider:

  • What are the privacy risks of mapping exact TB case locations, even without patient names?
  • What level of geographic aggregation (block, census tract, ZIP code, city) would be most appropriate, and why?
  • What additional context (socioeconomic data, healthcare access) would make the map more useful without increasing harm?
  • Who should be consulted before publishing this map? (Patients? Community organizations? Legal counsel?)

Draft a 1-page "Ethics Review" memo recommending whether to publish the map, at what scale, and with what caveats.

🤝 Interdisciplinary GIS: Philosophy & Law

Data ethics isn't just a technical problem; it's a philosophical one. We borrow heavily from Bioethics (autonomy, beneficence, justice). When you decide whether to map a vulnerable population, you are engaging in a debate that philosophers like Kant and Mill started centuries ago, now codified in laws like GDPR.

Summary of Big Ideas

  • Locational Privacy: Mapping individuals without their consent can lead to stalking, harassment, or discrimination.
  • Weaponized GIS: Maps used for gerrymandering or redlining can reinforce systemic inequality.
  • Data Sovereignty: Indigenous communities serve as creating and owning their own spatial data, rather than being mapped by outsiders.
  • Open Data Ethics: Choosing when to share data (e.g., protecting endangered species) is a critical geospatial skill.

Chapter 18 Checkpoint

1. Why is "Location Masking" used in health GIS?

To protect the privacy of patients by slightly shifting their coordinates.
To make the map icons look more organized.

2. What is "Critical GIS"?

Using GIS for critical infrastructure only.
Examining the social, political, and ethical implications of mapping.

3. What is "Data Sovereignty" in the context of Indigenous GIS?

The right of Indigenous communities to govern the collection, ownership, and use of data about their people and territories.
The government's right to classify geospatial data as secret.
The ability to store data on sovereign cloud servers.

4. What is the "Mosaic Effect" in spatial data privacy?

A cartographic technique for blending raster tiles.
The ability to re-identify individuals by combining multiple seemingly anonymous datasets (e.g., location + time + demographics).
A method for creating seamless satellite image composites.

5. Feminist GIS challenges the assumption that:

Women cannot use GIS software effectively.
GIS is a neutral, objective tool, arguing instead that it reflects the values and power structures of those who design and use it.
Qualitative data is more accurate than quantitative data.

📚 Chapter Glossary

Critical GIS An approach to GIS that examines the social, political, and ethical implications of mapping technologies and data practices.
Geoprivacy The right of individuals to prevent the disclosure of the location of their personal activities.
Geomasking A technique to protect privacy by displacing point data (random perturbation) while preserving the spatial distribution for analysis.
Data Sovereignty The right of a group (especially Indigenous peoples) to govern the collection, ownership, and application of data about their communities and territories.
Cartographic Silence The intentional or unintentional omission of features, communities, or phenomena from a map, which is itself a political act that shapes what is considered real or important.
Feminist GIS A critical approach to GIS that challenges the assumption of objectivity, advocates for incorporating qualitative and experiential knowledge, and examines how gender and power shape spatial data collection and representation.
Mosaic Effect The privacy risk that arises when multiple individually anonymous datasets are combined to re-identify specific individuals (e.g., combining location history, demographics, and purchase records).
GDPR (General Data Protection Regulation) A European Union law (2018) that governs how personal data — including location data — may be collected, stored, and used, establishing a legal framework for data ethics.
Indigenous GIS The practice of Indigenous communities using geospatial technologies to map, manage, and assert sovereignty over their lands, resources, and cultural heritage.
CARE Principles An ethical framework for Indigenous data governance: Collective Benefit, Authority to Control, Responsibility, Ethics.
Counter-Mapping The practice of creating maps that challenge dominant narratives, assert alternative perspectives, or document marginalized knowledge, often used by Indigenous or local communities.
Participatory GIS (PGIS) An approach that involves local communities and stakeholders directly in the GIS process, from data collection to analysis and map creation, to ensure their perspectives are represented.
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BoK Alignment

Topics in the UCGIS GIS&T Body of Knowledge that support this chapter.