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Hey all, I am working with a piece of property that has many lease/forest/dirt roads on it which are not mapped. Is there a way to automatically digitize/delineate all these roads? I can work with either Desktop 10.4 or Pro, and I have access to a 1-m resolution DEM and the property lines (see the hill-shade below) How can I do this, without manually drawing all those roads? I have tried working with the slope, but I have no idea where to go from there Also tried to reclass the raster based on slope, but it picks up the southern hill top as a road (since it has a low slope) Any help will be much appreciated. Thank you, Ovidiu
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02-26-2020
07:19 AM
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Curtis, I have ended up playing around with this extension, and it worked nice, especially the snap to raster function, but then it stopped working. After restart I could not make the ArcScan to recognize the raster so I can continue to digitize while snapping to the raster I reclassified the raster to two values, 1/0, with 1 being the contour lines, and that is where I started. Thank you,
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01-27-2017
06:24 AM
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So here is where I got now, I started from scratch, captured over 250 print-screens to assemble my tiff raster, after ArcMap import I have georeferenced, projected, and reclassified the raster to display only two colors. Than using ArcScan I have extracted the center-line of each contour and placed them into a new line feature. All that is left now is to do some corrections of the resulted lines. Lots of tedious work for me, but nowhere near as much as digitizing the whole thing. Thank you all for you input, Ovidiu
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01-23-2017
06:44 AM
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@Curtis Price - this is what I have done, but since this map covers an 18 mile long lake, and the contour lines are at 1 ft intervals it will take a long time to do by hand. Any advice on how to solve the problem automatically, or at least to reduce my work time?
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01-22-2017
06:12 AM
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Here is a copy/paste set of details regarding the raster file: <Columns_and_Rows> 30001, 28766 <Number_of_Bands> 3 <Cell_Size__X._Y_> 0.013888889, 0.013888889 <Uncompressed_Size> 2.41 GB <Format>TIFF <Source_Type>Generic <Pixel_Type>unsigned integer <Pixel_Depth>8 Bit <Colormap>absent <Pyramids>level: 7, resampling: Nearest Neighbor <Compression>LZW <Mensuration_Capabilities>Basic <Status>Permanent <Extent><Top> 399.527777778 <Left> 0 <Right> 416.680555556 <Bottom> 0 <Spatial_Reference>WGS_1984_Web_Mercator_Auxiliary_Sphere <Linear_Unit>Meter (1.000000) <Angular_Unit>Degree (0.0174532925199433) <False_Easting>0 <False_Northing> 0 <Central_Meridian> 0 <Standard_Parallel_1> 0 <Auxiliary_Sphere_Type> 0 <Datum>D_WGS_1984 <Statistics><Band_1><Build_Parameters>skipped columns:1, rows:1, ignored value(s): <Min>0 <Max>255 <Mean>253.5990525616515 <Std_dev.>14.24670552247798 <Classes>0 <Band_2><Build_Parameters>skipped columns:1, rows:1, ignored value(s): </Build_Parameters><Min>6<Max>255<Mean>253.6721133398082<Std_dev.>9.882874895876389<Classes>0 <Band_3><Build_Parameters>skipped columns:1, rows:1, ignored value(s): </Build_Parameters><Min>6<Max>255<Mean>250.7431879087078<Std_dev.>24.38898611239873<Classes>0 Thank you for any input you might have.
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01-21-2017
10:14 AM
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Hi Dan, The data is in WGS 1984 Web Mercator. In the contour tool I selected the interval to be 1, because the original contours are at 1 ft. intervals. The cell size is X/Y 0.013888889, 0.013888889. Now that you mention these, I am thinking that I should do a raster re-sampling to increase the cell size. Any advice is greatly appreciated. Ovidiu
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01-21-2017
07:02 AM
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Hi all, I am working with a raster file (.tif) that I have georeferenced, and now I would like to extract the contour lines of of it. After using the contour tool I am left with multiple lines representing a single contour line from the raster. Basically the tool does not recognize only the center-line of the contour line from the raster to generate an unique line (see attached image). How can I condense these lines, or generate a single (center-line) one. Thank you, Ovidiu
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01-21-2017
06:00 AM
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