I Built a Tool to Animate Trekking Routes — Here's Why Showing Beats Telling

Open almost any trekking company's website and you'll find the same thing describing the route: a static map with a red line on it, and a day-by-day itinerary underneath — "Day 1: Pokhara to Tikhedhunga, Day 2: Tikhedhunga to Ghorepani." It works. It's also the least interesting way possible to communicate what walking through the Annapurna foothills actually looks like.

Meanwhile, the broader geospatial industry has spent the past year moving hard in the opposite direction. Gaussian Splatting — a technique for turning point clouds and imagery into lifelike, explorable 3D scenes — is now natively supported in tools like ArcGIS. Reality capture is becoming mainstream. The entire trend line points toward one idea: geospatial data is more convincing when you experience it, not when you're told about it.

Nepal's trekking economy runs almost entirely on visual storytelling — Instagram reels, YouTube vlogs, trip reports with photo dumps. But the actual route itself — the thing every trekker is trying to picture before they book — is still usually a flat screenshot. That gap seemed worth closing.

What the tool does

I built a free tool on Google Earth Engine that turns any trail into an animated route reveal: draw the path on a map (or load a GPS track you've already recorded), and it generates a GIF of the line progressively drawing itself in, with a moving marker tracking the current position, over either satellite imagery or a terrain hillshade.

It also samples elevation along the route automatically and charts it — so you get a proper elevation profile without needing separate software.

To be upfront about what this is not: it doesn't fly or pan the camera along the trail like a cinematic drone shot. That kind of per-frame camera movement is possible in Earth Engine, but it relies on much more fragile math that's genuinely hard to get right without extensive testing. What this tool does instead is keep the whole route in view and let the line draw itself in — which turns out to be plenty compelling on its own, and far more reliable.

Why this matters beyond one gimmick GIF

A moving, drawn-in route does something a static map can't: it gives a sense of scale and pacing. Watching a line crawl from Nayapul up to Ghorepani communicates "this is a real distance, over real terrain" in a way that a single frozen map never quite does. Paired with an elevation profile, it starts to feel less like a marketing graphic and more like an honest preview of what the trek involves.

For trekking companies, this is a five-minute addition to a route page. For content creators, it's b-roll that doesn't require a drone. For researchers, it's a way to visually communicate a study area's terrain and access routes without writing three paragraphs of description.

The satellite data and the terrain models were always there. What's been missing is an easy way to turn them into something people actually want to watch.