Once you have a GIS package you can download and process the LIDAR data. The following is not intended to make you an expert in Graphical Information Systems(GIS), but simply to allow you to open LIDAR to a useful standard. There are plenty of YouTube tutorials on using GIS generally including some for archaeology specifically.<\/p>\n
1.\u00a0\u00a0\u00a0 Go to\u00a0 the Environmental Agency: You can alter the \u00a03D effect by adjusting \u00a0the illumination angle in the Hillshade dialogue box, \u00a0what you are effectively doing is positioning a faux sun to shine across the image. Effectively you can add illumination around 300 degrees\u00a0 of the compass, and with an angle as high as 40 degrees above the horizontal plane, which effectively allows a faux winter sun\u00a0 with long shadows in the low degrees up to a higher spring\/ summer sun with short shadows up\u00a0 towards the 40 degrees. Leave it at the default setting initially \u00a0and see how it looks, you can then open up Hillshade again, and play about with the angles if you need to, until you get the most effective image. Press OK and the image should render and file to the values introduced.<\/p>\n This is the basic technique, it produces the grey scale image as demonstrated below, to achieve the colour image to accentuate which are the lower and higher features, requires further processing, which is a technique for those who wish to develop their expertise in using GIS and LIDAR further, but outside the scope of this basic tutorial.<\/p>\n The image can then \u00a0 be moved to photo editing software like Adobe Photoshop, which allows the image to be manipulated \u00a0with \u00a0filters and false colours.<\/p>\n Here are a couple of examples of what can be achieved courtesy of Steve Kaye at Banda Arc Geophysics.<\/p>\n This is the latest \u00a0in the Archaeology Made Easy series LIDAR or Light Detection and Ranging is simply a posh name for an upscaled version of the laser measuring device you can buy from B&Q to carry out DIY In its simpliest form \u00a0it is a laser fitted to an aircraft flying parallel with … Continue reading No 5: LIDAR<\/span>
\nhttp:\/\/environment.data.gov.uk\/ds\/survey#\/download<\/a>
\nZoom into the map, \u00a0and download the relevant DTM file containing the grid block you want, at whatever resolution, \u00a0Once downloaded unzip the folder and file it somewhere. Please note, each ZIP file will contain multiple LIDAR tiles, identified by a 4 digit grid reference such as NZ3510, \u00a0when zooming into the Environmental Agency map, make a note of the 4 digit reference of the grid you are interested in to make it easier to find later in the file.
\n2.\u00a0\u00a0\u00a0 Open your GIS platform, Click on LAYER> ADD Layer> ADD RASTER LAYER, which will bring your document files\u00a0 up. Go to the file you saved your DTM files in, click on the one you want, \u00a0and a blurry image should appear in the QGIS \u00a0box.
\n3.\u00a0\u00a0\u00a0 Click on RASTER>TERRAIN> HILLSHADE, and the HIllshade dialogue box should appear. Click on the OUTPUT LAYER and pick a file to bung the processed image in. ( Make sure you put in the full file address, the best way is to do this, is to go to the file itself and click it from there, which will put the full file address into \u00a0the Output Layer dialogue box for you. . If you only type the basic file name in the Output Layer such as BlackWood or some such name, it will not be able to process and file the data, so full file name including c:\/ etc, etc, etc.), the only other thing you need to check is to \u00a0make sure GeoTIFF is the output format.<\/p>\n![\"wOODHOUSE](\"http:\/\/www.reiverenglish.com\/midtees\/wp\/wp-content\/uploads\/2017\/03\/wOODHOUSE-fARM-1-300x225.jpg\")
<\/a>![\"LIDAR\"](\"http:\/\/www.reiverenglish.com\/midtees\/wp\/wp-content\/uploads\/2017\/03\/WoodHouseFarm-300x164.jpg\")
<\/a>