What Does Eye Alt Mean in Google Earth? Unveiling Your Perspective

Picture this: Sarah, a budding urban planner, was meticulously scouting potential development sites in Google Earth. She’d zoom in, pan around, measure distances, and then scratch her head. In the bottom-right corner, a little number labeled “Eye Alt” kept fluctuating. Sometimes it was a few hundred feet, other times a few thousand, and then, inexplicably, it would jump to tens of thousands of miles. “What in the world is ‘Eye Alt’?” she’d murmur to herself. “Is it the height of the mountain I’m looking at? Or the exact elevation of the street corner? This ‘Eye Alt’ thing is a real head-scratcher and seems to change with every little scroll of my mouse. I just want to understand what I’m actually seeing!”

For anyone who’s ever found themselves in Sarah’s shoes, wondering what that curious “Eye Alt” reading in Google Earth signifies, let’s clear the air right off the bat. “Eye Alt” in Google Earth stands for “Eye Altitude,” and it precisely tells you the altitude of your virtual viewpoint, or camera, above the surface of the Earth. It’s not about the elevation of a specific point on the ground, nor is it the height of a building you’re looking at. Instead, it measures how high your virtual eyes are floating above the terrain you’re observing, giving you an immediate sense of your current perspective in the vast digital globe.

Diving Deeper: The Core Concept of Eye Alt

When you fire up Google Earth, you’re essentially looking through a virtual camera that’s hovering above our planet. Think of yourself as a pilot in a futuristic aircraft, able to instantly change your altitude and angle of view. “Eye Alt” is the read-out from that aircraft’s altimeter, telling you exactly how high you are in that moment. It’s a dynamic, real-time measurement that adjusts as you zoom in, zoom out, or tilt your view.

It’s crucial to understand that Eye Alt isn’t tied to any specific geographic feature’s height. If you’re looking at the Grand Canyon, your Eye Alt doesn’t tell you the depth of the canyon; it tells you how high *your camera* is above the general terrain where your view is centered. If your Eye Alt is, say, 5,000 feet, you’re viewing the Earth from that particular altitude. Zoom out, and that number will climb, reflecting your ascent to a higher vantage point. Zoom in, and it drops, indicating your descent closer to the ground.

This concept is fundamental because Google Earth isn’t just a static map; it’s a 3D model of the world. Your “Eye Alt” directly influences what you see and how you see it. A high Eye Alt will show you vast swaths of land, providing a macroscopic view – great for understanding regional geography. A low Eye Alt, on the other hand, brings out intricate details: individual trees, cars on streets, and the subtle contours of a landscape. It’s all about your observational position relative to the ground.

Why Google Earth Uses “Eye Alt” (and why it matters)

You might wonder why Google Earth doesn’t just display the altitude of the point directly beneath your cursor, or some other seemingly simpler metric. The reason lies in the very nature of how Google Earth renders and presents its incredibly detailed global imagery and 3D terrain. “Eye Alt” is a powerful, elegant solution to managing a truly immersive, interactive experience.

The Camera Metaphor in Action

Imagine a Hollywood film crew shooting aerial footage. They don’t just point a camera at the ground; they position the camera at a specific altitude, with a particular lens, and at a certain angle. Google Earth operates on a similar principle. Your “camera” (your viewpoint) has a position (defined by latitude, longitude, and Eye Alt) and an orientation (tilt and heading). Eye Alt is the vertical component of that camera’s position. It’s the anchor point for your entire perspective.

Rendering and Level of Detail (LOD)

One of the most impressive feats of Google Earth is its ability to seamlessly display everything from global views to street-level details without bogging down your computer. This is achieved through sophisticated “Level of Detail” (LOD) algorithms, and Eye Alt plays a starring role here. When your Eye Alt is high, Google Earth knows you don’t need to see the individual blades of grass. It loads lower-resolution imagery and simpler terrain models, saving processing power and bandwidth. As your Eye Alt drops, it intelligently switches to higher-resolution imagery and more complex 3D models, progressively revealing finer details. This dynamic adjustment based on your Eye Alt ensures a smooth and responsive experience, whether you’re soaring above continents or peeking into a backyard.

Performance Implications

Without Eye Alt as a central metric for rendering, Google Earth would either be impossibly slow (trying to render every detail of the entire planet at all times) or extremely simplistic (only ever showing low-res imagery). By tying the level of detail directly to your Eye Alt, the application can optimize its performance, only loading and rendering the necessary data for your current view. This efficient approach is what makes the immersive exploration of our planet possible on a standard desktop or mobile device.

Deconstructing the Google Earth Interface: Where to Find Eye Alt

For most users of the desktop version of Google Earth Pro, you’ll find the “Eye Alt” reading nestled comfortably in the status bar at the very bottom right of the window. It’s usually displayed alongside other critical pieces of information like:

• Latitude and Longitude: The precise geographical coordinates of your cursor’s current position.
• Elevation: The ground elevation (above sea level) of the point directly beneath your cursor. This is a common point of confusion with Eye Alt!
• Date of Imagery: The capture date of the satellite or aerial imagery currently displayed for that specific location.

As you navigate through Google Earth, whether by dragging the globe, using the navigation controls, or zooming in and out, you’ll notice that the Eye Alt value is constantly updating. It’s a real-time reflection of your virtual height. Sometimes it might jump in large increments, especially when you’re moving quickly or spanning vast distances, while other times it will smoothly tick up or down as you make finer adjustments.

For folks using Google Earth on the web or mobile, the display might be slightly different, but the core concept and the availability of this information remain. Often, the eye altitude might be implied by the zoom level or displayed in a more compact form, sometimes only appearing when you interact with specific view controls. Regardless of the platform, recognizing and understanding this number is key to mastering your Google Earth experience.

Eye Alt vs. Other Altitudes: A Crucial Distinction

This is where things can get a little fuzzy for many users, as Google Earth presents several altitude-related numbers. It’s vital to differentiate “Eye Alt” from other measurements you’ll encounter:

1. Absolute Altitude (e.g., Mean Sea Level – MSL)

When you see the “Elevation” or “Altitude” of a specific point on the ground in Google Earth (usually displayed next to the latitude and longitude of your cursor), this refers to its vertical distance above a standardized reference point, typically Mean Sea Level (MSL). This is the true geographic elevation of that spot. So, if your cursor is on top of Mount Everest, the elevation will be around 29,032 feet (8,848 meters) MSL.

Key Difference: Absolute Altitude is a property of a *place* on Earth. Eye Alt is a property of *your perspective* above Earth.

2. Relative Altitude (Above Ground Level – AGL)

Sometimes, particularly in aviation or surveying, altitude is measured “Above Ground Level” (AGL). This means the height above the immediate terrain directly beneath you. If you’re flying a drone 100 feet above a mountain peak, your AGL is 100 feet, even if the peak itself is thousands of feet MSL.

Key Difference: While Eye Alt *is* a form of AGL in a sense (your camera’s height above the terrain), Google Earth’s Eye Alt typically refers to the *absolute* height of your viewpoint above the geoid or ellipsoid (the Earth’s approximate sea level shape), then adjusts for local terrain. It’s more of a camera-centric absolute altitude that the application uses for rendering, rather than a relative measurement tied to a specific ground point for surveying purposes.

3. Terrain Altitude (Cursor Elevation)

As mentioned, the “Elevation” value in the status bar shows the altitude of the terrain directly underneath your cursor. If you move your cursor from a valley to a hilltop, this number will change, reflecting the varying elevation of the ground beneath it. This is a very useful measurement for understanding the topography of an area.

Key Difference: Terrain Altitude tells you how high the *ground* is at a specific point. Eye Alt tells you how high *your camera* is, regardless of what’s directly beneath your cursor or in the center of your screen.

To help clarify these distinctions, here’s a quick table:

Understanding these distinctions is paramount for anyone using Google Earth for more than just casual browsing. It ensures you’re interpreting the data correctly and making informed decisions based on what the numbers truly represent.

Practical Applications: How Eye Alt Shapes Your Google Earth Experience

Beyond being a technical readout, Eye Alt is a powerful tool that subtly (and sometimes not so subtly) guides your interaction with Google Earth. Recognizing its role can significantly enhance how you use the platform for various tasks.

Planning a Hike: Visualizing Terrain

Let’s say you’re planning a hike in the Rockies. With a high Eye Alt (several thousand feet), you get a great overview of the mountain range, spotting major peaks and valleys. As you zoom in, lowering your Eye Alt to a few hundred or even a few tens of feet, you start to see the nuances of the trail: switchbacks, dense tree cover, even small streams. This ability to smoothly transition from a macro to a micro view, driven by your Eye Alt, is invaluable for understanding the scale and difficulty of the terrain you’ll be traversing.

Real Estate Scouting: Getting a Bird’s-Eye View vs. Street Level

For a real estate agent or prospective homeowner, Google Earth is a treasure trove. A high Eye Alt (a few thousand feet) allows you to see how a property sits within its neighborhood, its proximity to schools, parks, or major roads. As you drop your Eye Alt to around 500-1000 feet, you can assess the property’s size, roof condition, and backyard features. Get down to a super low Eye Alt, almost like a drone flying just above the rooftops, and you can even get a sense of the landscaping, fencing, and immediate surroundings, complementing Street View imagery.

Education and Research: Understanding Scale

Educators often use Google Earth to teach geography, geology, and environmental science. Eye Alt becomes a tangible representation of scale. Showing students a coastline from an Eye Alt of 100 miles versus an Eye Alt of 100 feet dramatically illustrates the difference between global patterns and local erosion features. Researchers, too, leverage this to analyze spatial data at varying resolutions, from continental fault lines to individual archaeological digs.

Urban Planning: Assessing Building Heights and Density

Urban planners routinely use Google Earth to visualize proposals and analyze existing cityscapes. By adjusting Eye Alt, they can quickly switch between a general city plan view (high Eye Alt) to examining the impact of a new skyscraper on the surrounding blocks (lower Eye Alt). When Google Earth’s 3D buildings are enabled, adjusting your Eye Alt allows you to see how new developments fit into the existing urban fabric, understand shadow impacts, and assess visual corridors from different perspectives.

Gaming and Simulation: Perspective Setting

While not a direct gaming platform, Google Earth’s underlying technology and data are used in many simulators and games. In these contexts, “Eye Alt” or similar camera altitude parameters are critical for setting the player’s perspective. Whether it’s a flight simulator needing precise altitude readouts or a strategy game requiring a tactical overview, the concept of Eye Alt is foundational to how these virtual worlds are rendered and explored.

In every one of these scenarios, Eye Alt isn’t just a number; it’s the dial that controls the richness and relevance of the information presented to you, empowering you to choose the perspective that best suits your current objective.

Mastering Your View: Tips and Tricks for Controlling Eye Alt

Controlling your Eye Alt effectively can turn you from a casual browser into a Google Earth power user. Here’s how you can take charge of your perspective:

1. The Mouse Wheel: Your Primary Zoom Control

This is the most intuitive method. Rolling your mouse wheel forward zooms in (decreasing Eye Alt), and rolling it backward zooms out (increasing Eye Alt). It’s quick and responsive, making it ideal for rapid changes in perspective.

2. The Navigation Controls: Finer Adjustments

In Google Earth Pro, you’ll find a set of navigation controls in the upper right corner of your map view (or accessible through keyboard shortcuts). The zoom slider (often resembling a ‘+’ and ‘-‘ button) allows for more controlled, gradual changes in Eye Alt compared to the mouse wheel. You can click the buttons or drag the slider. This is especially useful when you need to land at a very specific Eye Alt.

3. “Go To” Feature: Precise Positioning

If you need to view a specific location from a very particular altitude, the “Go To” feature (often found under the “Search” or “Fly To” panel) is your best friend. You can enter specific coordinates (latitude, longitude) and, crucially, a desired “Eye Alt” value. Google Earth will then “fly” you to that exact spot and set your camera at that precise altitude. This is fantastic for creating consistent views for presentations or comparing different locations from the same perspective.

• Steps for “Go To” with Eye Alt:
  1. Open the “Search” panel (usually on the left side).
  2. Enter your desired location (e.g., “Eiffel Tower, Paris”).
  3. Google Earth will fly there. Now, if you want to be precise:
  4. You might need to adjust the view manually first, then save a placemark.
  5. Alternatively, for precise numerical input, you often define it within KML files or advanced scripting, or by creating a placemark and editing its properties. When you create a placemark (right-click -> Add -> Placemark), you’ll see options for “View” or “Snapshot current view.” The saved view includes the Eye Alt.

4. Saving Placemarks with Specific Eye Alt

When you create a placemark in Google Earth, it doesn’t just save a point on the map; it saves a *view*. This view includes your latitude, longitude, tilt, heading, and, yes, your Eye Alt. When you double-click a saved placemark, Google Earth will automatically fly to that location and set your view to the exact Eye Alt you had when you saved it. This is incredibly powerful for creating guided tours or ensuring consistency across different viewing sessions.

• Tips for Saving Effective Placemarks:
  • Zoom and position your view exactly as you want it first.
  • Go to “Add” -> “Placemark” (or use the placemark icon in the toolbar).
  • Give it a descriptive name.
  • Crucially, ensure the “Snapshot current view” or similar option is selected (it usually is by default). This locks in your Eye Alt, tilt, and heading.
  • Click “OK.” Now, whenever you click this placemark, you’ll return to that exact perspective.

5. Using the Ruler Tool (and what it *doesn’t* do for Eye Alt)

The Ruler tool is excellent for measuring distances and areas on the ground. However, it’s important to note that using the Ruler tool itself does *not* change your Eye Alt. Your Eye Alt remains constant while you’re measuring, allowing you to take precise measurements from your established perspective. It’s a great example of Eye Alt defining the “lens” through which you measure, but not being directly affected by the measurement process itself.

By consciously controlling and understanding Eye Alt, you unlock a deeper level of interaction with Google Earth, transforming it into a more precise and powerful tool for your specific needs.

Common Misconceptions and Troubleshooting Eye Alt Issues

Even with a good grasp of Eye Alt, folks sometimes run into situations that can be a bit puzzling. Let’s tackle some common misconceptions and troubleshooting tips.

“My building looks flat! I know it’s a 3D model.”

This is a classic. You’re trying to admire a magnificent 3D model of a skyscraper, but it just looks like a flat image on the ground. The most likely culprit? Your Eye Alt is too high! When you’re viewing from a very high altitude, Google Earth automatically flattens out the perspective to show a broader area, prioritizing horizontal coverage over vertical depth. To truly appreciate 3D buildings, you need to lower your Eye Alt significantly, bringing your viewpoint closer to the ground and increasing the “tilt” of your camera. As you do, the 3D models will pop into view with their true vertical dimension.

“Why can’t I see details? The imagery looks blurry.”

Again, a high Eye Alt is often the primary reason for blurry or low-detail imagery. Google Earth’s Level of Detail (LOD) system means that when your Eye Alt is high, it displays lower-resolution imagery. As you zoom in (decreasing Eye Alt), higher-resolution imagery should load. If it doesn’t, there could be a few other factors:

• Internet Connection: A slow connection might prevent the high-res tiles from loading quickly. Give it a moment, or check your internet speed.
• Cache Issues: Sometimes cached (saved) low-res images can persist. Clearing your Google Earth cache (Tools -> Options -> Cache tab -> “Delete cache content”) can help.
• Imagery Availability: Not every square inch of the planet has super high-resolution imagery. Some remote areas simply won’t have the same detail, no matter how low your Eye Alt goes. Check the imagery date in the status bar; older imagery often means lower resolution.

“My saved placemark doesn’t look right when I click it.”

If you’ve saved a placemark but when you revisit it, the view is all wrong (e.g., too high, wrong angle), it usually means you didn’t “snapshot” the view correctly when you created it. As discussed, when you add a placemark, make sure your view (including Eye Alt, tilt, and heading) is exactly as you want it *before* you save. If you just click a spot and save without adjusting the view, it might default to a generic altitude or a previous view setting.

The “Tilt” Factor and How It Affects Perceived Eye Alt

Google Earth allows you to tilt your view, so you’re not always looking straight down (nadir view). When you tilt, your camera is still at a certain Eye Alt, but the *horizon* appears to rise. This can sometimes make it feel like your Eye Alt is lower or higher than it actually is, because the visible ground plane changes. Always remember, Eye Alt is your camera’s vertical position, regardless of its angle. You can tilt your view without changing your Eye Alt, and vice-versa. The tilt control (often via the ‘Shift’ key + mouse drag, or the tilt slider in the navigation controls) works independently but in conjunction with Eye Alt to create your overall perspective.

Being aware of these common snags can save you a lot of head-scratching and help you get the most accurate and visually appealing results from your Google Earth explorations.

The Technical Underpinnings: How Google Earth Renders with Eye Alt in Mind

To truly appreciate “Eye Alt,” it helps to peek behind the curtain a bit and understand the technical magic Google Earth employs. It’s a marvel of geospatial engineering that manages petabytes of data and renders it dynamically on your screen. Eye Alt is a central cog in this complex machine.

Level of Detail (LOD) Algorithms

We touched on this earlier, but it bears a deeper dive. Google Earth uses advanced LOD algorithms to decide which data to load and display. Imagine the Earth’s surface covered in thousands of tiny squares, each with multiple versions of imagery and terrain data, ranging from very low-resolution (for global views) to extremely high-resolution (for street-level views). The Eye Alt acts as the primary switch. When your Eye Alt is, say, 1,000 miles, Google Earth fetches and displays the “Level 0” or “Level 1” data tiles – broad strokes, minimal detail. As you zoom in and your Eye Alt drops to 10 miles, it swaps those out for “Level 10” data tiles, which are more detailed. Drop to 500 feet, and you might get “Level 18” or “Level 19” tiles, showing individual cars and highly textured terrain. This tiered system, driven by Eye Alt, is what allows for the seamless zoom experience without overloading your system.

Imagery Resolution

The satellite and aerial imagery that forms the visual fabric of Google Earth comes from diverse sources and at various resolutions. Some areas might have imagery down to 6-inch per pixel, while others might be 10 meters per pixel. Google Earth’s rendering engine constantly assesses your Eye Alt to determine which resolution of imagery is appropriate to display. If you’re at an Eye Alt where a 10-meter pixel would look like a giant blurry square, it will try to pull in finer resolution data if available. If you’re at a very high Eye Alt, displaying 6-inch resolution imagery would be a waste of resources and would not be perceivable to the human eye anyway, so it sticks with lower-resolution mosaics.

3D Models and Their Visibility

The stunning 3D models of buildings and terrain also rely heavily on Eye Alt for their rendering. When your Eye Alt is high, only simplified block models or even just the footprints of buildings might be rendered, or sometimes none at all. As your Eye Alt decreases and your view becomes more oblique (tilted), Google Earth loads and displays the full, textured 3D models. This is particularly noticeable in major cities where extensive 3D model coverage exists. The software makes intelligent decisions about when these resource-intensive models are needed and perceivable.

Performance Optimization: Only Rendering What’s Needed

At its heart, Eye Alt is a powerful performance optimization tool. It prevents your computer from trying to render the entire Earth at maximum detail at all times. By knowing your Eye Alt, Google Earth can intelligently:

• Load only the necessary imagery tiles within your current field of view.
• Select the appropriate resolution for those tiles.
• Render 3D models only when they are close enough and relevant to your perspective.
• Stream data efficiently over the internet, minimizing bandwidth usage.

Without Eye Alt guiding these decisions, Google Earth would be an unwieldy, slow, and data-heavy application, severely limiting its accessibility and utility. It’s a testament to good design that such a crucial technical component is also so intuitive for the end-user.

My Take: Why Eye Alt is More Than Just a Number

Having kicked around Google Earth for years, both for professional tasks and just plain old curiosity, I’ve come to see Eye Alt as far more than a simple metric. It’s the numerical representation of your connection to the Earth’s surface, the scale through which you perceive reality. It empowers you to shift from a god-like vantage point observing continental drift to a granular perspective examining a specific rooftop, all with a flick of the wrist.

Understanding Eye Alt is about understanding perspective. It’s about knowing that when you’re soaring at 100,000 feet, you’re not just seeing the land; you’re seeing geological patterns, major infrastructure, and the immense scale of our world. When you’re down at 500 feet, you’re experiencing a more human-centric view, one that reveals the intricacies of urban design, natural landscapes, and even personal properties.

For me, Eye Alt isn’t just a technical specification; it’s the key to truly *interacting* with Google Earth’s rich dataset. It allows for intentional exploration, precise analysis, and a deeper appreciation for the planet we inhabit. It’s a fundamental piece of the Google Earth puzzle, helping us unlock the full potential of this incredible tool.

Frequently Asked Questions (FAQs)

What’s the difference between Eye Alt and elevation?

This is a common point of confusion, and it’s essential to get it right. Eye Alt (Eye Altitude) refers to the vertical height of your *virtual camera or viewpoint* above the Earth’s surface. It’s about *your* perspective. As you zoom in or out, your Eye Alt changes.

Elevation (also sometimes called terrain altitude or absolute altitude) refers to the vertical height of a *specific point on the ground* above a reference datum, typically Mean Sea Level (MSL). When your cursor hovers over a mountain peak, the elevation displayed is the height of that peak, not your camera’s height. If you move your cursor over a valley, the elevation number will drop, even if your Eye Alt (your camera’s height) remains the same. Eye Alt is about where you are looking from; elevation is about how high the ground is at a particular spot.

Can I change the Eye Alt units (e.g., from feet to meters)?

Yes, absolutely! Google Earth Pro allows you to customize the units for various measurements, including Eye Alt and elevation. To change this, you’ll need to go into the program’s options:

1. Open Google Earth Pro.
2. Go to the “Tools” menu at the top.
3. Select “Options” (on Windows) or “Preferences” (on Mac).
4. In the “3D View” tab, look for the “Show Lat/Lon” and “Show Elevation” sections.
5. You’ll see a dropdown menu (often labeled “Units of Measure” or similar) where you can select your preferred units, such as “Feet, Miles,” “Meters, Kilometers,” or “Decimal Degrees.”
6. Choose your desired units, then click “Apply” and “OK.” The Eye Alt and elevation readings in the status bar will instantly update to your chosen unit system.

Does Eye Alt affect the accuracy of measurements in Google Earth?

Directly, no, Eye Alt does not affect the inherent accuracy of Google Earth’s underlying geospatial data or its measurement tools. The platform uses precise coordinate systems and digital elevation models regardless of your current view. However, Eye Alt can *indirectly* affect the *perceived* accuracy or the *ease* of making accurate measurements.

For example, if your Eye Alt is very high, it can be harder to precisely click on the exact start and end points for a measurement because individual features appear much smaller and closer together. Lowering your Eye Alt, and zooming in, makes it easier to place your measurement points accurately, thereby improving the precision of your *input* to the measurement tool, even though the tool itself remains accurate. So, while Eye Alt doesn’t change the data’s integrity, it definitely influences your ability to interact with it precisely.

Why does Eye Alt sometimes jump around when I move or zoom?

Sudden or jerky changes in Eye Alt can happen for a few reasons, and it’s usually part of Google Earth’s dynamic rendering process:

1. Rapid Zooming: If you’re scrolling your mouse wheel very quickly, Google Earth makes large jumps in Eye Alt to keep up. It might skip intermediate altitudes to provide a smoother *visual* transition, even if the number jumps.
2. Loading New Terrain Data: As you move across the globe, Google Earth is constantly loading new terrain data (the underlying 3D model of the Earth’s surface). If there’s a significant change in the average elevation of the terrain beneath your view (e.g., flying from a flat plain to a mountainous region), the system might adjust your Eye Alt slightly to maintain a consistent visual distance from the ground, especially if “Terrain” is toggled on.
3. Network Latency/Performance: A slow internet connection or a computer under heavy load can sometimes cause slight delays or stutters in the rendering engine, which might manifest as jumps in the Eye Alt display as the system catches up.
4. Saving/Loading Views: When you fly to a placemark or a saved location, Google Earth quickly transitions to the saved view, which includes a specific Eye Alt. This sudden change can appear as a “jump.”

In most cases, these jumps are normal operational behavior as Google Earth optimizes your viewing experience and are nothing to worry about.

Is there a maximum or minimum Eye Alt in Google Earth?

Yes, there are practical limits, though they’re not always hard-coded numerical cutoffs that you’ll hit and get an error message.

Maximum Eye Alt: You can zoom out to see the entire Earth as a globe, and your Eye Alt will often be in the range of tens of thousands of miles (e.g., 12,000 to 15,000 miles or more). This puts you well into orbit, giving you a truly global perspective. Beyond this, further zooming out doesn’t really add more perspective of the *Earth* itself, so the software typically stops increasing the Eye Alt significantly, showing you the Earth against the blackness of space.

Minimum Eye Alt: You can zoom in incredibly close, bringing your Eye Alt down to just a few feet or even inches above the ground. In areas with very high-resolution imagery and detailed 3D models, you can practically “fly” at eye level down a street. The practical minimum is usually limited by the resolution of the imagery – once you zoom in past the point where individual pixels are visible, further zooming (lower Eye Alt) doesn’t reveal more detail, just larger pixels, and the software might effectively “bottom out” in its ability to decrease Eye Alt meaningfully, perhaps keeping it a few feet above the surface to prevent “flying” *through* the terrain.