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Hello, Many thanks for your response. The reason why I wanted to create buffers is the following: my next step will be adding a layer with addresses of study participants. By mapping the buffers, I could visualize the approximated severity of pollution for each participant. But now that I think about it, I could of course do exactly the same with the graduated symbols, simply by changing the sizes and transparency. In order to assign more accurate pollution levels to each participant, I could then - in the next step - apply inverse distance weighting approach. Thanks for sharing the links with me! Interpolation of the data looks like a good way to present my results in the first place, before I start with the epidemiological analysis. Best, Gosia
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11-13-2015
03:37 AM
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Thank you for your reaction! So far I have only tried to create 500 m buffers, thus numeric and for each coordinate point the same. I will start playing around with different distances once I know how to create the "simple" buffers. Best, Gosia
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11-10-2015
12:40 AM
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Good morning, Please find a screenshot above. Each coordinate has 15 attribute columns assigned to it.. So far I have only tried to use 500 m as a buffer distance. Only once I know how to create these, I will start looking for ways to assign relative buffers based on the severity of pollution. Best, Gosia
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11-10-2015
12:37 AM
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Hello! Yes, it is in a projected coordinate system. With selection step, I meant the selection of the Input Features in the Buffer tool. When I select my shape file, that shape file has 15 different values assigned to each of the 40 coordinates (15 different pollutants). There is no option in the buffer tool to select only one variable from the attribute table of the shape file (1 pollutant). I am not sure that that is the reason why the created buffers are not displayed, but I guess that could be a plausible reason.. Although it is also plausible that I am wrong. Thanks again!
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11-09-2015
06:27 AM
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Many thanks for the quick reply. I tried that option indeed, but I didn´t manage to get the results displayed yet. I assume that that is because in the selection step you can only select which feature you want to work with, but not which particular column. So many different buffers per point are calculated, but since they all differ, none is visualized. I have tried several ways of selecting only one column and working solely with that, but so far no success. Any tips? Best, Gosia
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11-09-2015
04:26 AM
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Dear all, I have a database with 15 different pollutants measured at 40 stations. So it is a database of 15 columns and 40 rows. What I am trying to achieve is to create maps for each pollutant separately, that show the location of the 20 measurements, the severity of pollution at that particular spot (indicated with the size of an icon) and a buffer around each station with a certain distance from the center, depending on the severity of pollution measured at that particular station. I am new to ArcGIS and I have now created the maps with graduated symbols, but somehow I cannot find a way to create buffers around the measurements. Any help will be greatly appreciated! BR, Gosia
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11-09-2015
03:22 AM
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