How can I use Didger to convert Lat/Long into feet or meters for volume calculations in Surfer?
Often when calculating volumes in Surfer the elevation data is in Imperial or Metric, but the xy coordinates are in Lat/Long. This is usually the case when using field data collected with a GPS unit. These mixed units will produce meaningless results when using Surfer’s Grid | Volume command. Where you may expect a net volume of hundreds of thousands of cubed units, the results are usually a few thousandths of a single unit. To match the units on all three axes you will need to convert the Latitude and Longitude coordinates to a system whose native unit is feet or meters. You can do this in Didger 4 with either Surfer Grid [.GRD] files or the original xyz data file. First identify the z data unit. If meters the Lat/Long coordinates will need to be converted to UTM. If feet, you will want State Plane.Use Didger’s File | Import command to import the grid or spreadsheet. If using a Surfer Grid file the coordinate and elevation data will automatically associate with the correct fields. If
Related Questions
- What are the "official" conversions that are used by NGS to convert 1) meters to inches, and 2) meters to feet?
- What are the "official" conversions that are used by NGS to convert 1) meters to inches, and 2) meters to feet?
- How can I use Didger to convert Lat/Long into feet or meters for volume calculations in Surfer?
- What factor is used to convert meters to feet?
- What factor is used to convert meters to feet?
- How to Convert Feet to Meters
