Latest Contributions by SamuelFonseca

That is an important piece of information. I would think you can use the link table to assign the equivalent 5_k IDs to the points with 6_K IDs; and then use the 5_k IDs in both point sets to do what you need to do. If that's the case, try Join Field tool to transfer the equivalent 5_K IDs to the points through the common 6_K IDs. hmm... sorry but I don�??t get it ... I do the join and then what? I can´t find a way to calculate distance between the two related points, a near analysis will give me the closest point but that point may not be the one I´m interested on. Using distance tools I´ll get the huge distance matrix again... In case you do not find a way to get a solution using the system tool, here is a python script you can try on. import arcpy proposed = r'D:\data\f.gdb\points_A' original = r'D:\data\f.gdb\points_B' # create an empty dictionary to store shapes proposed_points = {}  with arcpy.da.SearchCursor(proposed, ("5k_ID", "Shape@")) as cursor:         for row in cursor:         # populate the dictionary         # use 5k_ID field value as the key of the dictionary         proposed_points[row[0]] = row[1]          # create another dictionary original_points = {} with arcpy.da.SearchCursor(original, ("5k_ID", "Shape@")) as cursor:         for row in cursor:         # populate the dictionary         # use 5k_ID field value as the key of the dictionary         original_points[row[0]] = row[1]      # iterate one of the dictionaries with ID values for id_5k in proposed_points:         # get proposed and original points with same ID     orig = original_points[id_5k]     prop = proposed_points[id_5k]         # now find the distance     dist = prop.distanceTo(orig)         print dist That script looks good... i´ll try to look intoit and let you know how it goes... THX a lot!! ... View more

If the 5K_ID for related points in two files don't match, are there any other criteria or conditions (spatial or attribute information) that can be used to "match" them? If not, you may need to step back and look into the processes that have caused the unmatched IDs. Sometimes the problem occurs in early processes and may be solved more easily. The thing is that it is not a problem in the data. I´ll try to give you some more background: The points come from two sources of somewhere around 6500 moving sampling points each one. Each data set is created by a different company and they were supposed to be almost identical, but they are not. And we must check on a daily basis how far apart are the two companies taking the â??relatedâ?� measurements. In the beginning the two companies were using the same codes (5_K) to identify the sites, but now they have different ID´s (5_K and 6_K) and one of them is not doing a good job managing their ID´s so equivalence between 5_K ID and 6_K ID is not always the same but they do provide what I call a Link table telling me which points on the daily results are supposed to be equivalent Are the 5k_ID values unique for each of the point feature classes?  If possible, could you please share your data (keeping only the 5k_ID field)? You can send the data to my email as well:   nahmed@esri.com It will be easier if you use Python script - do you want that? A Python script will be just fine!!... and yes, I can share a little data... I´ll attach a excel file with 3 pages, the first one is a subset of my 5_k data, the second page contains the coordinates from what Iâ??ll call the 6_K points and the third page is the link table. Please note than in the file I´m giving you, the points are in the same (correct) order, but that is not the way it normally is, thats why I need to use the link table. Any other ideas are still quite welcome!! And before anyone askâ?¦ NO we can not kick any of the two bad companies causing me so much troubleâ?¦ lol ... View more

Samuel, Have you had a look at Hawths analysis tools - Distance between Points tool: http://www.spatialecology.com/htools/pntdistbetw.php Regards Anthony In fact I have Anthony but the problem is the same than with the point distance tool... The output tells me the distance to any other point in the shape and I need to know only the distance to one of them. Having more than 5K pints on my shapes makes unpractical to do it in that way. As for the "point to line" method, it does solve the problem to some extent but it has one important limitation and that is that the two 5K codes used to generate the lines must be identical and here is where my problem gets more complicated... Let´s add another variable to the original problem. In the original shapes, the two related points were named the same (same 5k_ID) and I was looking for a way to calculate distance from point "a" in shape "A" to shape "a" on shape "B", but now I have another field on my shape (or another table/shape) where the points are related in such a way that the 5_KID´s don match any more. And I must calculate the distance from point �??a�?� on shape �??A�?� to the point �??b�?� on shape �??B�?� and I need to do it once a day for 5000 points... NobbirAhmed     If Anthony's or Dan's suggestion hasn't solved your issue - please let me know which version of ArcGIS you are using. I'm on ArcGis 10.1 and have Advanced Lic. BTW: Coordinated system and datum�??s are no problem ... View more

Here is a workaround idea: 1. Make sure the two sets of points are in the same projection/coordinate system; then use the Merge tool to combine them into one input. 2. Use the Points To Line tool with the 5k_ID as the Line Field to obtain lines between each pair of proposed and real points. The line output carries the 5k_ID field and the Shape_Length values would be the distances you need. For shapefile output, you would need to add a field and then calculate the shape length, using the Add Field and Calculate Field tools. 3. Run the Join Field tool to join the line output with any of the two point inputs via the common 5K_ID to transfer the Shape_Length field to it. Does it work for you? I´m so far sounds like a good way to get it... i{ll let you know if have any more problems.. THX for the help ... View more

use GenerateNearTable using the same FC for both in_features and near_features and the 'ALL' option on closest. That give you a (potentialy very big) table of distances between every point and every other. You can also get the bearing angle too, if you want. PointDistance may work for you too. You may want to make selections on the 5K_ID field before running it, to get (many) smaller tables to work with. you need an advanced license to use GenerateNearTable or PointDistance Without that: AddXY_management will give you locations for each point. You could then do some trig on the X,Y location differences between pairs of matched points Thx for the answer, I have already done what you suggested, but as you pointed out I get a huge table containing distances to all the possible combinations and the process takes a lot to execute, Now I need either a way to calculate distances only to the corresponding points or a way to filter the result table to get only those results I need. ... View more

For your workflow, the because of the manner at which the values are generated with the 'Generate' button, you will have to make the max/min have the decimals or it will not include them.  The wizard will simply do the direct math.  Since your first first value is 5 and specify 10 values the algorithm will then create the values as a straight division.  I entered decimals and then the output would have decimals.  From what I understand about your complaint, you want the same types of divisions of classes, but since you are altering the minimum and max value the classes appear to be generalize.  Your old class interval was roughly 1.1 and the new one is 1, hence the discrete values.  Because of the values you are inputting and the way that the algorithm works, I would call what you are seeing as expected behavior. So to avoid the loss of decimal, then make the interval value of 1.1 (if that is desired).  What you are doing is making the data discrete and then specifying a discrete interval without a decimal in the label. THX for your reply, bot I think it is not what I'm asking for... I do understand why the classes are different and I actually want them to be in increments of 1. The problem is more with the generated color ramp. As you can see on the screen shots I posted after i´ve changed the min/max values, the labels disappear. I'm not complaining about the way the algorithm calculates the divisions, the problem is that I´m loosing the labels generated by that algorithm ... View more

No one?? please guys I really need to solve this. Or at least know if it�? only me who's sufering... ... View more