topic Re: selecting lowest points of a point cloud for surface modelling in Spatial Data Science Questions https://community.esri.com/t5/spatial-data-science-questions/selecting-lowest-points-of-a-point-cloud-for/m-p/102325#M204 <HTML><HEAD></HEAD><BODY><P>An image would help.</P><P>When you mean hull, are you looking for some kind of 3d convex hull (no tools currently exist) or are you using the term in a general context.&nbsp; Perhaps the statistical properties of the data set could be exploited if the site definitely represents&nbsp; the area.&nbsp; An artificially filled location might represent smaller variations in elvations than the surrounding area, for instance, but a picture would help</P></BODY></HTML> Tue, 31 May 2016 23:04:57 GMT DanPatterson_Retired 2016-05-31T23:04:57Z selecting lowest points of a point cloud for surface modelling https://community.esri.com/t5/spatial-data-science-questions/selecting-lowest-points-of-a-point-cloud-for/m-p/102324#M203 <HTML><HEAD></HEAD><BODY><P>Hello everybody,</P><P></P><P>Being new to the forum and hope that I'm placing my question at the right place. I have a number of points (ca. 2000) with x/y/z coordinates, which are archaeological finds coming from an artificially filled basin. I would like to reconstruct the inner surface of the basin.</P><P>Can anybody tell me, if there is a way to calculate a hull, based on the points being positioned on the outskirts of the point cloud and then to cut away the upper part of the hull, producing an approximation of the basin?</P><P></P><P>Cheers,</P><P>Archeohorst</P></BODY></HTML> Tue, 31 May 2016 15:03:05 GMT https://community.esri.com/t5/spatial-data-science-questions/selecting-lowest-points-of-a-point-cloud-for/m-p/102324#M203 AydinAbar1 2016-05-31T15:03:05Z Re: selecting lowest points of a point cloud for surface modelling https://community.esri.com/t5/spatial-data-science-questions/selecting-lowest-points-of-a-point-cloud-for/m-p/102325#M204 <HTML><HEAD></HEAD><BODY><P>An image would help.</P><P>When you mean hull, are you looking for some kind of 3d convex hull (no tools currently exist) or are you using the term in a general context.&nbsp; Perhaps the statistical properties of the data set could be exploited if the site definitely represents&nbsp; the area.&nbsp; An artificially filled location might represent smaller variations in elvations than the surrounding area, for instance, but a picture would help</P></BODY></HTML> Tue, 31 May 2016 23:04:57 GMT https://community.esri.com/t5/spatial-data-science-questions/selecting-lowest-points-of-a-point-cloud-for/m-p/102325#M204 DanPatterson_Retired 2016-05-31T23:04:57Z