I've converted a shapefile (points) to KML with QGIS. Points in the shapefile are within 100m distance from each other. When I measure it in Google Earth, the distance changes to 80m. The same happens with the created GPX file. Why is this?
My original shapefile was created in WGS84/UTM Zone 20S because I needed to work with the metric system. I'm working with data belonging to an area no larger than 6 square kilometers. As to avoid the problem I am having now, I reprojected it to WGS84 (EPSG 4326) by "saving as" and changing its SRC before I then created the KML and GPX. Both KML and GPX show the same surface, the difference comes along with the shapefile.
Sample coordinates are:
id lat long POINT(-61.82795607536099425 -37.83722374457502724) POINT(-61.82861595101069696 -37.83772772712714527) POINT(-61.82724009148368083 -37.83767676392982793) POINT(-61.8278967620074269 -37.83817748597036257)