Z factor hillshade arcgis software

Convert the elevation units such as meters or feet to the horizontal coordinate units of the dataset, which may be feet, meters, or degrees. It is the number of ground x,y units in one surface zunit. Specific azimuth and altitude angles are set and a zfactor to convert z units in feet to meters. The surface area and ratio arcgis extension enables you to generate raster datasets of surface. If the z units of the data being used are feet, first use the raster calculator to multiply the raster by the conversion factor 0. Arcgis has many useful tools for calculating slope, aspect, hillshade and curvature from dem rasters. This zfactor adjustment method is cumbersome to implement with latitude longitude. Hello, i have a question about z factors and how to use them within a slope analysis and hillshade function. Setting the z factor parameter correctly arcgis blog.

Hillshadeslope analysis and z factors geonet, the esri. The zfactor is a conversion factor that adjusts the units of measure for the. Generally, hillshade dems are clearer if the basic elevation layer is multiplied by 2 or 3. The hillshade tool creates a shaded relief raster from a raster. Configure the options for rendering, then click apply hillshade. The zfactor is a scaling factor used to convert the elevation values for two purposes. Determine what the middle latitude of the area of interest is.

The usgs hydrosheds program is in the process of deriving good. Pdf relief visualization techniques using free and open. Ensure the zfactor is 1 because our x,y and z values are all in meters. Not setting the zfactor correctly makes the hillshades look heavy or leaden. I understand that the z value has to be converted to degrees using a z factor of. In this case changing the z factor to 2 will multiply the input dem by 2. Create a hillshade raster of the base dem dem03, in this example using the spatial analyst tools. This zfactor adjustment method is cumbersome to implement with latitudelongitude. The standard format for elevation data in gis is a digital elevation model dem in raster format.

If the model shadows option is disabled unchecked, the output raster only considers local illumination angle. If the x,y units and zunits are in the same units of measure, the zfactor is 1. Home creating 3d visualizations in arcmap using hillshade. The arcgis software suite has many useful capabilities for handling geospatial data including.

The zfactor adjusts the units of measure for the zunits when they are different from the x,y units of the input surface. Relief visualization techniques using free and open source gis tools. It is not uncommon to perceive the output from hillshade as looking peculiar if the. Hillshade one direction 315 degrees top and hillshade one direction 45 degrees bottom comparison of popular gis software by availability of blending modes colour hypsometric tint with two. The zvalues of the input surface are multiplied by the zfactor when calculating the final output surface. These values will be processed with calculations for slope and aspect to determine the final hillshade value for each cell in the output raster. The zfactor parameter is in many spatial analyst and 3d analyst tools.

The zfactor is a conversion factor that adjusts the units of measure for the vertical or elevation units when they are different from the horizontal coordinate x,y units of the input surface. Basic visualization of lidar digital elevation models using arcgis. Here we present several techniques which combine hillshade with other relief data layers derived from dem and. Using arcmap hillshade command to simulate 3 dimensional images. The input dem is multiplied by the z factor before calculating shadows. Open hillshade, hillshade window is appears select elevation layer and output layer, output format default is geotiff is ok, type z factor 300. The hillshade raster has an integer value range of 0 to 255. The illumination source is considered to be at infinity. If you add appropriate or correct zfactor to your dem while creating hillshade, you can avoid too much contrast in the hillshade and too much bumpy in the flat areas. I have been with esri in software products since 1994. X and y are in decimal degrees while z is in meters. By default, a grayscale color ramp is used to display a hillshaded elevation model.