topic Re: Calculating gradient along a line using Points and Raster? in 3D Questions https://community.esri.com/t5/3d-questions/calculating-gradient-along-a-line-using-points-and/m-p/624775#M3739 <HTML><HEAD></HEAD><BODY><P>Actually I have another Idea. Because I have all the associated other habitat data for these "segments" in a spreadsheet, I can actually just extract the elevation values for the points, then copy those into my spreadsheet and get the gradient figures from there....</P></BODY></HTML> Mon, 23 Mar 2015 22:24:02 GMT ChristopherClark1 2015-03-23T22:24:02Z Calculating gradient along a line using Points and Raster? https://community.esri.com/t5/3d-questions/calculating-gradient-along-a-line-using-points-and/m-p/624774#M3738 <HTML><HEAD></HEAD><BODY><P>Ok. I am not sure what the best route is to go about this. </P><P></P><P>I have collected line features (basically streams I walk along) and they have zvalues. So I have a set of lines...</P><P></P><P>I then made a set of points called Reach_Boundary. These are the up stream boundaries of a segment of the stream line. But they are just points. I have these points snapped right to the line. The upper boundary of segment 2 is the bottom boundary for 3, and so on up the line.. I also have a point file called Stream_Mouths that serve as the bottom boundary of the first stream line segment. This picture is an example of the data. THe line is the stream line with z information, and the points are segment boundaries. Notice on the far left point it is a brighter shade of Red, this is the stream mouth point, which is also the downstream boundary for the first segment. A segment is any portion between the lines..</P><P><IMG alt="StreamExample.png" class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/77998_StreamExample.png" style="width: 620px; height: 228px;" /></P><P></P><P>I need to get a slope gradient for each segment. Should I first merge my point files, so the Stream_Mouth point and the Reach_boundary points are all in one feature class?</P><P></P><P>Then would I convert my line work into a raster, and use the points to extract values? My though is I could make a new column in the stream boundary point feature called Start_ELEV, and END_ELEV then create a new column called GRAD which would be populated by taking the (differrence between start Elev and End elev and dividing that by the length of the segment) (aka Rise/run).</P><P></P><P>Anyone think of a different way? Im brainstorming...</P></BODY></HTML> Mon, 23 Mar 2015 22:12:26 GMT https://community.esri.com/t5/3d-questions/calculating-gradient-along-a-line-using-points-and/m-p/624774#M3738 ChristopherClark1 2015-03-23T22:12:26Z Re: Calculating gradient along a line using Points and Raster? https://community.esri.com/t5/3d-questions/calculating-gradient-along-a-line-using-points-and/m-p/624775#M3739 <HTML><HEAD></HEAD><BODY><P>Actually I have another Idea. Because I have all the associated other habitat data for these "segments" in a spreadsheet, I can actually just extract the elevation values for the points, then copy those into my spreadsheet and get the gradient figures from there....</P></BODY></HTML> Mon, 23 Mar 2015 22:24:02 GMT https://community.esri.com/t5/3d-questions/calculating-gradient-along-a-line-using-points-and/m-p/624775#M3739 ChristopherClark1 2015-03-23T22:24:02Z