The State Plane Coordinate System (SPCS)
The State Plane Coordinate System divides the United States into 124 zones to locate any point with a high level of accuracy (one part in 10,000).
Articles
Kriging Interpolation – The Prediction Is Strong in this One
The prediction is strong in kriging. In this guide to geostatistics we embark on a journey to sculpt a legendary prediction model with kriging interpolation
What Are Contour Lines on Topographic Maps?
Contour lines have constant values on them such as elevation. But it’s also used in meteorology (isopleth), magnetism (isogon) & even drive-time (isochrones)
Map Distortion with Tissot’s Indicatrix
Map distortion is best understood looking at Tissot’s indicatrix. It contains circles and shows how map projections distort shape, size and distances.
An Introduction to Esri ArcGIS Online (AGOL)
Have you ever wanted to create interactive web maps for your organization? Or how about the whole world? You can with Esri’s cloud-based ArcGIS Online.
Geosynchronous vs Geostationary Orbits
While geosynchronous satellites can have any inclination, the key difference is that satellites in geostationary orbit lie on the same plane as the equator.
Death, Taxes and the Esri ArcGIS 999999 Error: How to Fix It
Some things in life are certain. In ArcGIS, it’s the Esri 999999 error. Here are techniques to troubleshoot this ArcMap error.
10 Best Free Land Cover/Land Use Data
Over the span of your life, how much has the Earth changed? Quite a bit, but you probably just can’t put a number to it. You actually CAN with land cover.
Choosing Between Personal and File Geodatabases
If you’re a bit confused whether or not to use a file geodatabase (*.gdb) or a personal geodatabase (*.mdb)… Here’s everything you need to know.
Why Are Rhumb Lines (Loxodromes) a Constant Track Direction?
Rhumb lines (or loxodrome) have constant bearings and cross all meridians at the same angle. They are not the shortest distance between 2 points on a sphere