45⁰N – 90⁰W Geographic Marker

Seiler Instrument is proud to have helped along with many other local surveying firms with the monument restoration and relocation of the 45th Parallel of Latitude and the 90th Meridian of Longitude. In short, the 45°N 90°W Geographic …

Seiler helps Support Engineers Without Borders USA- SIUC

Seiler loves to help support schools and nonprofit organizations like Engineers without Borders, USA, to help improve quality of life in worldwide communities and specifically, we focus on where we can help most – ones with land surveying needs. Seiler...