[UW-GIS-L] lidar data to hillshade
jeffjr at u.washington.edu
Sat Aug 6 08:00:39 PDT 2011
Another method is to convert your points to a raster where the z value
equals the raster value. Then it's easy to convert to a hillshade using the
hillshade function in spatial analyst.
If you have aerial LiDAR data, it's likely that the vendor already put the
data into a proper projection (probably UTM if the data are in meters).
On Fri, Aug 5, 2011 at 3:38 PM, Harvey Greenberg <hgreen at u.washington.edu>wrote:
> So, you can bring the points into arcmap with ASCII3DtoFeatureClass from
> the toolbox. At this point, you have the option of specifying a projection.
> If your meters are measured from a piece of rebar hammered into the ground
> at (0,0), you have no projection, but you can later georefence. If your
> meters are in a projection like UTM zone 18S (Y values around 9000000 would
> be a clue), you can indicate that. Having a projection is not essential,
> but it makes it easy to incorporate data from other sources.
> Once you have points, you can create a TIN (or a terrain if you want to be
> fancy) to connect the points with triangles. Then the topography can be
> displayed as a hillshade.
> On 8/5/2011 3:06 PM, Robert A Norheim wrote:
>> As Chris said, you don't need the lat/long to just generate a hillshade.
>> However, if you want the hillshade to be *georeferenced* and able to be
>> shown on a map with other geospatial data layers, then use the
>> georeferencing toolbar in ArcMap.
>> --Rob Norheim
>> On Fri, 5 Aug 2011, Chris Gardner wrote:
>>> If you have x,y, and z, then the x and y values will give you the
>>> horizontal positions in whatever coordinate system the data exists in.
>>> you then need to convert it to lat/long values? I?m confused-
>>> Sent: Friday, August 05, 2011 1:51 PM
>>> To: uw-gis-l at u.washington.edu
>>> Subject: [UW-GIS-L] lidar data to hillshade
>>> I have x,y,z coordinates (all in meters) that I want to convert to
>>> hillshade in Arcmap. I don't have any latitude and longitude data per se,
>>> although I do know the lat and long for a couple of points.
>>> Anyone know how to create a hillshade from this?
>>> Jennifer Diercksen
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>> Uw-gis-l at u.washington.edu
> hgreen at u.washington.edu 374 Johnson Hall 206-685-7981
> Harvey Greenberg
> University of Washington
> Department of Earth and Space Sciences
> College of the Environment
> Box 351310
> Seattle WA 98195-1310
> Uw-gis-l mailing list
> Uw-gis-l at u.washington.edu
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