Latest Contributions by NeilAyres

Say you have some DEM data, a raster where each pixel represents the elevation of that pixel. You load it into ArcMap, and it would generally default to a gray scale image (black to white colour ramp). If you want to send someone a "picture" if the data, rather than the data itself, you can apply another colour ramp (maybe Elevation 2 or something), maybe use a graphic to cut out a small section, if you right click on the dem and select data / export, then click the Use renderer & force RGB, the exported raster is now a 3 band (RGB) image of the original. Original gray scale raster. New colour ramp. RGB image output. ... View more

<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 That, to me, looks like this tif hasen't been georeferenced at all, just defined as Web Merc ... View more

It is common in river research to define sinuosity as a ratio of channel length over straight line distance. See here : sinuosity But in terms of roads, I agree with jborgion Rather look for better evidence of what constitutes "dangerous". ... View more

In answer to your first question a gdb (a file geodatabase), is a container for many features classes, tables etc etc. So no, you don't need multiple gdb's 1 for each feature. Try looking through this : manage-data/main/what-is-geodata ... View more

An island polygon, if I get your drift, would have only 1 neighbour ... View more

Have you looked at the Polygon Neighbour tool, available at all licence levels. analysis-toolbox/polygon-neighbors ... View more

Couldn't you just publish that mxd you have now, with all three services in it? ... View more

Have you looked at the surface volume tool? surface-volume ... View more

Download Notepad++, very handy, will open almost any textfile no matter how big. But if the problem has gone away (at least for now....), then everything is moot. Good luck. N ... View more

You may want to move this thread to Coordinate systems or somewhere. Might get more visibility then where it is now. ... View more

Yes, I realise that wkid 43041 is a projection type rather than a fully formed PCS. So, you need to set one up perhaps centred on the middle of your project area. If you save it in favourites, you can find the prj in userbanme/appdata etc etc. Open that up with a text editor, then copy it into your python script. Becareful to surround the entire string with single quotes (all the internal ones are double quotes). Then edit the string to put the formatting placeholders "{}" at the places you require. Then you're good to go. ... View more

Some excellent links provided by Dan Patterson What have you tried so far and what makes you say that the result was "not that good"? I also think a few pictures helps. So here is an old esri pdf on interpolation. ... View more