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Dear all, if I classify a Polygon with dozens of attributes, they will all be sorted alphabetically. Is there any chance to GROUP these attributes according to a second attribute (I know I can do this manually, but it would not be clear in the Legend). Example: I have a Polyline Layer "Transportation" with these attributes: highway (1. Attribute: car, 2. Attribute highway) path (1. Attribute: pedestrian, 2. Attribute path) road (1. Attribute: car, 2. Attribute road) sidewalk (1. Attribute: pedestrian, 2. Attribute sidewalk) Now I would like to Group them according to the 1. Attribute and maybe even make this visible in the Legend: "Transportation" Car highway road Pedestrian path sidewalk any ideas on this. Seems to be too complicated to do it directly in ArcGIS Desktop, or not ? Thanks for your input Hmm..... :rolleyes: I just realised while typing this, that I could create Layers with the VBA request '1. Attribute="car" ' and so forth!! )
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04-24-2012
08:29 AM
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Hey, Dan thanks for your input. Indeed it ist kind of difficult. The ideal output would contain multiple rows and columns. I did not now that the parcel editor would create polygons starting from one direction only. But still it would work for us: We could first divide the are from East to West and then further from North to South. So we would create subareas as long as we would receive our desired output area. To be honest, at the moment I don't have any solution how to treat the area around the fishnet containing only subsets of squares. One would be to calculate their area and manually merge those ones who make up approximately the same area as one fishnet Square. regards
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03-01-2012
02:23 AM
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Hi Konrad, What version of ArcMap are you using. Based on other forum posts you have made, I am assuming you are using ArcMap 10.0 with an ArcView license. You did, however, say that you were looking for scripts for ArcView 3.0. If you could confirm your version, this would help me in assisting you. Regards, Juliana W. ESRI Desktop Support Juliana, sorry for the confusion and thanks for your help. We have indeed an ArcMap 10.0 with an ArcView license only. I found some scripts from Bill Huber (who seems to be the only guy in the whole world wide web who has a real clue about the issue 😄 ) which only work in ArView 3.3 thats why I did some research there as well. But since ArcMap cannot import scripts, its useless. So I am here, right at the beginning of the story again. Not knowing what to do. I found a PostGIS script which can divide a Polygon in two exact half pieces, but for me thats not enough. It would be so great if Esri would sell single Toolboxes. We are only interested in this little function, or lets say the parcel Manager. Not the whole Editor or even Info License .... 😞
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02-23-2012
09:45 PM
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sounds weard, but there seems to be absolutely NO solution for this basic problem (apart from the Parcels Editor). I found a commercial extension being able to split a Polygon ONCE. Not feasible though to divide a whole area. http://www.ian-ko.com/ET_GeoTools/UserGuide/ETSplitPolygonByArea.htm Any further input will be highly aprreciated guys. Thanks in advance !
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02-22-2012
12:56 AM
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Wow! Thanks a lot, thats 100% what we need. Unfortunately, we only have an ArcView License and to upgrade for the Parcels Editor only seems not feasible. I will investigate in all OpenSource solutions and also the free Script which exists for ArcView 3.0 on the ESRI sites. http://forums.esri.com/Thread.asp?c=3&f=38&t=208496 Thanks again for your helping me with this ...
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02-16-2012
01:39 AM
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Dear Alexey, thanks for your answer. The fishnet solution is exactly how we are working at the moment. But since the result is a bunch of SQUARES, it usually doesn't fit our IRREGULAR forest polygon 100%. As we are talking of hundreds of parcels we have to work with automatic processes. So I populate a fishnet with the desired area (or smaller and merge them afterwards). Then I clip the fishnet polygons with the forest polygon and delete all parcels which are smaller then the given fishnet area (since they have been clipped). Therefore unfortunately, after cutting all squares which are not exactly 0,25 ha (for example) I have a lot of area which is then classified as not used (see attachment). Thats why I was asking for a solution which would divide THE WHOLE area in subpolygons, even if they are irregular in their shape. Meaning I would tell Arcgis to divide my forestpolygon of 31,7h ha in 31 parcels (meaning each of them a bit bigger then 1 ha). That would be exactly what we are looking for to avoid gaps at the edges (which can easy add up to some hectares in our case). I hope I could explain it somehow clear, sorry for my bad written english ...
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02-15-2012
10:05 PM
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Dear community, we are working with a lot of big forest parcels and want to divide them into (exact) 1ha, 0,25ha parcels and so forth. Is there any kind of algorithm which could do this automatically? Up to now, we are overlaying polygon-rasters of smaller size then the desired output and merge the small squares. But of course the parcels we get cant fit 100% in our forest area (squares in irregular polygons). Other solutions are drawing parcels by hand and estimating the area, calculating it as an attribute, take a small bit of or ad a bit and so forth until we get the area of 1 Hectar. Do you guys have any idea how we can automate this process? and if not as "divide polygon in 0,25 ha pieces" something like " divide polygon in 20 equal areas"? It would save us time and space in our layers :rolleyes: I fear this is to heavy to calculate but still hope for suggestions thanks for you input, regards Konrad
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02-14-2012
05:06 AM
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