Latest Contributions by AndreasDaim

To drop the time: create new column and use this simple expression in Field Calculator with Python parser: !Erfassungsdatum![:10] (which takes only first 10 characters) By the way, if you've found my previous answer helpful, mark my post as answered using voting tools: thx a lot, everythings fine! I marked it - for sure! Just waited for this answer 😉 king regards andreas ... View more

Try this two-steps approach: 1. Select all blue/black polygons B which are in large green polygon A using Select By Location from Selection menu. 2. Use Summary Statistics tool (Analysis->Statistics->Summary Statistics) to calculate summary area for each type of polygon B with settings:   - Statistics Field: Shape_Area   - Statistics Type: SUM   - Case field: type field - the field based on which you differentiate polygons color. worked fine thx! I just used as type field my "capture date" and in fact, that the format is sometimes dd.mm.yy and sometimes with dd.mm.yy + time I got seperated values. Can i drop the time before in my attribute column? [ATTACH=CONFIG]19045[/ATTACH] gz andreas ... View more

Then would it make sense to convert the polygon features to line for purposes of this Near analysis?  I'm assuming you have that capability (do you have this advanced license or other means to convert?). This way you can 'force' the computation of distance to the boundary of the poly - I think this is what you're asking.  Otherwise, without this intermediate step (converting the poly boundary to line), ArcGIS has no way of knowing that you mean, either the interior (part of the polygon) or the boundary (also part of the polygon). If this doesn't quite make sense, look over more carefully the docs on Near (which are very good, including illustrations [although not of your special case]): http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00080000001q000000 now I got it, worked out fine with polylines/centroid - thx Caleb & Whitley! little last question: how to easy rejoin the resulting NEAR column with my origin attribute table for the impact polygons? Would like some simple stepwise description, if fact, that I'm not familiar with Arcmap. gz andreas ... View more

Caleb's suggestion sounds good to me.  I'm assuming you created the centroid points okay?  If so, you need the distance from these points to the green line, correct?  So I suppose the green line is in a line feature class, you can execute Near with the centroid points as input and the line feature class as the near feature(s).  If that is failing, can you elaborate more on what is going wrong? centroid points worked fine. But the green line isn't a line feature, its the boundary line of a polygon (no fill colour just boundary line template) demonstrating a meadow in real, and the polygons which of i created the centroids are on and within this meadow polygon (demonstrating different impacts in real). And they are not clipped, just laying uppon once another. I attacht another example: impact polygon (blue/yellow) uppon meadowpolygon (selected, green boundary) [ATTACH=CONFIG]18996[/ATTACH] And with this constellation I can't measure the distance as suggested because I can just selecte by NEAR the polygon "meadow" and get the result "0" of course. But i need the distance: impact polygon to the boundary of the meadow polygon. ... View more

hey, Tryed the first suggestion but didnt work at the step, where to calculate the point to polygon BOUNDARY distance, because the points are within/on the polygon. The polygon represents the field, the points the influcence on it - and I need the distances to the field boundary? best regards andreas ... View more

Have you looked at the Attachments toolbox?  There are tools in there for creating match tables that can be used to assign features attachments. that's what i was looking for, works fine - thx a lot! greets andreas ... View more

so with attachment: 1) measure distance from center of blue polygon to nearest other feature (black arrow) 2) or also measure distance from center of multipartpolygon (black+blue polygon) to nearest other feature (yellow arrow) [ATTACH=CONFIG]18787[/ATTACH] gz andreas ... View more

so I would like to calculate the shortest distance from the (damage)polygoncenter to the boundary of the (meadow)polygon they are within. illustrating attachment: [ATTACH=CONFIG]18786[/ATTACH] best regards andreas ... View more

Make sure that you don't have any features selected in the table or in the dataframe when you run the repair geometry.  Also, the apparent self intersections may represent multiparts of a polygon and are indeed valid geometry oh - thx a lot, think I had selected something, therefore no new results appeared! gz andreas ... View more

hm, just figured out, that just a few polygons were selected by the check geometry tool. there are many left, with crossing lines. some other action? gz andreas ... View more