Free GeoTIFF Viewer: Open Orthomosaics and DSMs in Your Browser
Drop in a GeoTIFF, Cloud Optimized GeoTIFF (COG), orthomosaic or elevation model. It opens right here, on your device, with nothing to install and no account.
Open a GeoTIFF
The file is read by your browser and stays on your device.
Loading the viewer…
Ready to send this to a client? Import it into a DataDelivery job and share it as an interactive map in their browser.
Start FreeYour file is opened by your browser and never leaves your device. This page loads Google Analytics, which records anonymous usage events such as that a file was opened and its size range; it never receives the file, its name, location or contents.
What it opens, and its limits
| Item | In this viewer |
|---|---|
| Files | GeoTIFF (.tif or .tiff), including BigTIFF and Cloud Optimized GeoTIFF (COG). |
| Products | Orthomosaics (3 or more bands) in color. DSMs and DTMs (1 band) with a color ramp, a legend and the value under the cursor; no-data areas stay clear. |
| Compression | None, LZW, Deflate, PackBits, JPEG, Zstandard and WebP. Other compressions show a message. |
| Large files | A COG opens at any size and reads only what is on screen. A GeoTIFF over 100 megapixels with no overviews opens at full resolution only, around the center. Tiles or strips over 256 MB each cannot be read. |
| Coordinates | Shown in the file's own coordinate system, with a scale bar, a north arrow and the latitude and longitude under the cursor, all worked out on your device. If the coordinate system is not recognized, the file opens in pixel coordinates. |
| Background map | None. The file is shown on a plain background, so nothing about the area you are viewing is requested from a map service. |
| Import check | A quick check of the rules DataDelivery applies when you import the file. The final check runs when you import. |
Questions about the GeoTIFF viewer
Is my file uploaded?
No. Your browser opens the file on your device and reads only the parts it needs to draw the view. The file never leaves your device. The page loads Google Analytics, which records anonymous events such as that a file was opened and its size range. It never receives the file, its name, location or contents.
What is the largest GeoTIFF I can open?
There is no fixed size limit; what matters is how the file is stored. A Cloud Optimized GeoTIFF (COG) opens in moments at any size, because the viewer reads only the overview and the tiles in view. A GeoTIFF over 100 megapixels with no overviews opens at full resolution only, around the center, and reading it takes longer. A file whose tiles or strips are over 256 MB each cannot be read in a browser.
Why is my GeoTIFF slow to open?
It most likely has no overviews, so every view has to be read from the full-resolution image. Save it as a Cloud Optimized GeoTIFF (COG), or add overviews to it, in your mapping or GIS software. A COG carries smaller copies of the image, so the viewer reads only what fits on screen.
What does "Coordinate system not recognized" mean?
The file has no coordinate system this page can read, or one it cannot convert to latitude and longitude. The image is shown in pixel coordinates instead, without a scale bar or north arrow. Before you import it into DataDelivery, export it again with a standard EPSG coordinate system.
Can I measure on the map here?
Not here. This viewer is for looking at your file. In DataDelivery you can measure distance, area and perimeter on the map over your orthomosaic, and save measurements as named layers. Figures are approximate.
Related
Open-source credits: this viewer is built with OpenLayers (ol, BSD-2-Clause), geotiff.js (geotiff, MIT), proj4 (MIT), geotiff-geokeys-to-proj4 (BSD-3-Clause), zstddec (MIT AND BSD-3-Clause), pako (MIT AND Zlib), lerc (Apache-2.0), wkt-parser (MIT), mgrs (MIT), rbush (MIT), quickselect (ISC), quick-lru (MIT), @petamoriken/float16 (MIT) and xml-utils (CC0-1.0). Read the licences.