Latest Contributions by NeilAyres

Have a look at the data using Catalog and the normal file explorer first. Is the path to the data that doesn't work complicated? Got spaces in it? on a remote server? etc I am trying to recall how the *.ers file works. Is it a pointer to another file which contains the actual imagery? Look at the properties page in Catalog, and see the files involved using the file explorer. ... View more

It will indeed be a transformation issue. The coordinate system of the line (UTM 33S) has nothing to do with the underlying GCS source of the data. I am surprised that QGis makes such a good fit! But I do suspect that there is something about the original data (how was this line acquired?), and the coordinate system of the ArcMap data frame. Was the correct transformation selected here? Camacupa is a tricky one. I researched this many moons ago. All the available transformations between Camacupa & WGS84 have been calculated by the oil industry and are for specific offshore oil concessions. Back then there were no valid transformations for onshore Angola. I would like to hear from Miguel if this situation has now been rectified. Google translate version: Na verdade, será uma questão de transformação. O sistema de coordenadas da linha (UTM 33S) não tem nada a ver com a fonte subjacente GCS dos dados. Estou surpreso que qgis faz um bom ajuste, tais! Mas eu suspeito que há algo sobre os dados originais (como foi esta linha adquirido?), Eo sistema do quadro de dados do ArcMap coordenadas. Foi a transformação correta selecionada aqui? Camacupa é um assunto delicado. Eu pesquisei isso muitas luas atrás. Todas as transformações disponíveis entre Camacupa & WGS84 foram calculados pela indústria do petróleo e são para concessões específicas de petróleo offshore. Naquela época não havia transformações válidos para onshore Angola. Eu gostaria de ouvir de Miguel se esta situação foi agora corrigida. ... View more

Thus indicating that there is something wrong with the order of the points. ... View more

I think you are out of luck there.... ... View more

Just had a play with this in ArcMap. Arc draws the points in their order, so I just edited your coordinate list. Those last 2 at the beginning. Then I deleted 98.93,85.17 because it is very close to another point. Alos when you construct a line from these points, arc just connects the dots. So the part through SAm looks relatively smooth, but that over northern Russia has only a couple of points. I tried the smoothing functions in the Cartography toolbox, but Bezier or paek smoothing options didn't quite do it. You need a curve fitting algorithm, I know that Ianko's ET Geotools has these. ... View more

Yes, depending on the response data and the distribution of the points, interpolation can be tricky to get something that looks "real". Best do some experimenting with the various interp types and parameters. As regards having several readings of the same thing at a single point... Do you want to create several different surfaces ie temp at depth xxxx. To do this you would have to separate out the different depths, perhaps by making different layers with definition queries which select out the depth/temp combo as desired. If you want variance (range??), you could simple calculate a new value (max - min??). ... View more

Here's an old, but useful quick guide to interpolation from Colin at esri ... View more

Do you have access to spatial analyst? You will need to interpolate your point data into a raster surface. Which interpolation method you choose is up to you, and influenced by the distribution of the point data and the variation in the response variable. Try nearest neighbor or idw as a start. If you want to spend months doing this you could also look at the tools in geostatistical analyst. ... View more

Although I can't see the scale distance between your 2 output sets of points, the problem is very likely to be a transformation problem. That Batch Project tool is a bit clonky. The dialog at the bottom to select your desired transformation doesn't offer a pulldown of suitable transformations. You just have to type in its name. If you miss-spell it by a fraction, I suspect it will just ignore the transformation and project anyway. ... View more

Identity analysis, does a geometric intersection of the 2 sets of polygons. If you want only 1 attribute record (with multiple separate polygons) run a dissolve on the output to create a multipart feature. ... View more

Or (even worse) defining something as Balk z 7 when in fact its not.... ... View more

Its just simple trig. Make a sketch. Offset from grid = 6.5deg (in this example, to the right of north). If adding an offset of 100... newX = KnownX + Sin(6.5) * 100 newY = KnownY + Cos(6.5) * 100 ... View more

If it is actual paper you can just use a set square and the scale bar to offset 3 other cords from your 1 known point. A similar procedure applies if the data is digital. You would have to figure out (by examining the scalebar in the drawing) if the digital units are actual real world units or some fraction of them. ... View more

There are many ways to process rasters in the SA tool set. But first, what is the pixel size of your dem / slope, especially relative to your distance of 25ft. You could segment your slope raster ie split out only those parts which have a slope greater than 40%. Then perhaps look at Region Group & Tabulate Area tools. ... View more

Exactly, are you sure that this featureClassPath = "myGIS.DBO.myData" is correct. Try the ListFeatures inside the workspace first to make sure you have the path correctly defined. ... View more