Latest Contributions by NeilAyres

You could use feature to 3d by attribute. But can't remember if that was there in 10.1. ... View more

As far as I recall, time slider looks at each record for the time, so you could have a time enabled layer for "deforested"  (using a definition or something) and see each land parcel appear in the appropriate year. Similarly for your other categories. But you can't time slide across each record. Or am I misunderstanding the situation. ... View more

Well, how does it "not work". Errors, what happened etc etc. How are the image layers being managed? In a mosaic? raster dataset? as images? ... View more

You have left most of your shapefile behind. There is only the *.shp. Can't do anything with that. A shapefile has several components *.shp, *.sbx, *.dbf, *.prj and possibly several others. What do you mean by inbound & outbound? ... View more

You probably need to show us the data and exactly what you want to do. What do you mean "merge" all the point data attributes? How to merge? add them up? count them? ... View more

Probably, your only solution is to build a polylineZ from the points via arcpy / python. If you give us a look at your point data, I am sure someone can give you a start to help you do this. ... View more

If you have a series of measured points with datum 1 X, Y, Z and datum 2 X, Y, Z, you can calculate a geocentric transform between the 2. Most survey software will do this and we can do it here as well. ... View more

But, all these details are doing is pinning down the principal point in terms of the WGS84 ellipsoid. So therefore it is based on that. That is all. It is WGS84 based, that's all you need. You cannot define a "Custom Datum". You can however define a custom datum transformation between known and defined datums. That is how transformations are calculated between old "classical" datums and more modern ecef type datums (chiefly WGS84) are defined. So, you still don't need a custom datum. ... View more

As far as I am concerned, you don't need to define a new datum for this. It is equivalent to GCS_WGS_1984. But perhaps someone with more experience in this area like MKennedy-esristaff might like to comment ... View more

If neither of these tools meets your needs, you may have to "roll your own" using python. But data comparisons can be tricky (there is so much to compare...). But the geometry equals and other methods for geometry do enable you to do this. And if you structure it correctly, it might not be that slow. If you do a spatial joint between the 2 sets of features first, then compare the actual geometries using the method.... Then, the attributes. Can get complicated... ... View more

Thanks Blake for the tips on named tuples.... ... View more

The service is looking at the underlying mxd (or an image of it in memory somewhere). So, whether you use style sheets or not, the layer inside ArcMap would have to have all the possible types of polygon for instance. Say you had a whole bunch of building footprints, and they were classified into 4 "types" : House, Office, Restaurant; Commercial or something. If you only had actually 3 of these in your layer, they would draw, but there is no restuarant until someones edits and adds one. Then it would appear, without you having to re-publish. And add the extra type of feature into the toc. If you add some category that is not in the TOC then you wont see it. That's what domains and so forth are about, controlling allowed entries. Then you can set everything up beforehand. ... View more

See some of the help docs...what-are-symbols-and-styles ... View more