ECW Viewer

The ECW Viewer Online tool provides browser-based access to ECW raster data without the need for desktop GIS. It renders a tiled mosaic directly in the browser, enabling rapid visual validation of content, extent, and resolution. The system decodes only the tiles required for the current view, preserving bandwidth and reducing wait times for large datasets. This approach supports quick decision-making in planning, field work, and client communications.
Conceptually, ECW files are treated as tiled pyramids; the viewer reads embedded metadata, selects the appropriate tiles, and composes a seamless display for review. The tool also exposes core raster metadata such as CRS, extent, pixel size, and bit depth.
Who benefits includes GIS analysts, surveyors, educators, and project stakeholders who need fast checks, comparisons, and metadata access while coordinating across teams. The in-browser processing reduces data transfer and avoids installation barriers.
Unique value lies in privacy-preserving, client-side decoding, immediate previews, and lightweight metadata export (CSV) without requiring full GIS workstations. Core features encompass file upload, tile rendering, in-browser decoding, CRS/metadata extraction, and CSV export of attributes. Typical use cases involve onboarding new ECW datasets, validating data alignment between sources, and sharing concise results with colleagues or clients.