Consider the 2D curve in the figure below.

To illustrate the type of ambiguity that may occur, let’s look at a simple 2D example. There are often ambiguities in such a point set, since there is no information about the relationship between the points, also known as connectivity. Once imported, a point is assigned an index according to the line number in the file for its coordinates. Values and indices can be separated by space, comma, semicolon, or tab characters. In this format, you can use an optional % (percent) character to indicate a comment line. In the software, it is called the Spreadsheet format. This is one of the simplest types of coordinate formats that COMSOL Multiphysics can import. The screenshot below of a text file in Notepad shows the beginning of a point cloud data file with x-, y-, and z-coordinates organized in tab-separated columns. The points typically originate from the surface of a physical object that has been scanned using a laser, metrology tools, radar, etc. In this blog post, we will show how point cloud data can be converted to geometry models that can be used for simulation in the COMSOL Multiphysics® software.Ī point cloud is a set of points in 3D given by x-, y-, and z-coordinates. Sometimes the only data you have available is a set of points, also known as a point cloud. There also exists some websites where you can convert coordinates, like cs2cs, where you can input a list of delimited coordinates, and choose the source and target projection, to get your desired output.Not all analysis projects start with a CAD model. Or you can use a transformation library like Pyproj, GDAL ogr2ogr, etc. The math being much more complex for transverse Mercator projections, I suggest using a GIS software, like QGIS, ArcGIS, to import your points as WGS84 UTM Zone 17N, transform them to Geographic WGS84, and calculate the new geometry coordinates.

In order to find the latitude and longitude of your points from X, Y, there are different options. Looks promising to me, because the latitude matches exactly. If that location rings a bell, then your points are likely in UTM Zone 17N - feet. My coordinate system guess for your points would be WGS84 UTM Zone 17N, but feet instead of meters.

The arctan2(y,x) function would output the longitude of the point if they were expressed in some specific coordinate systems like polar azimuthal or geocentric, but I doubt this is the case here.

Xy data file converter