ArcGIS - Geodatabase Topology - Part 2

ready for more topology us to part two so in the last video we created some topology we validated it and that was applying those rules and that allowed us to also also visualize it in our catalog next we want to go into arcmap and try to figure out how to fix these rules or fix fix the errors to the rules so what I've done is opened up the blank arcmap session and then I'm gonna drag and drop this topology into it and then it's gonna ask me if I want to add all the feature classes that participate in this topology of the map and almost always the answer is gonna be yes because you're gonna be editing those in order to fix these errors so I've got my my trails my boundary and all the areas that I've been identified before now before I do any editing we need to kind of configure arcmap in order to do topology editing so I want to go in and make sure that I've got a couple different toolbars here but I got the editor I've got a snapping environment set up and then down here below outside the window is the topology toolbar so I want to add all those and so this is the editor snapping and then over here are the topology toolbar now they're showing up in gray right now because I don't have an edit environment started so just like editing features and creating new lines of polygons and modifying them all my topology changes are going to be inside in an edit session I'm gonna save this just to make sure that I don't lose things that's incredibly important when you're doing editing to always save more often than often start editing environment as long as everything is in the same Petrie data said I won't get any errors there and I'll be able to edit anything that's over here my table of contents oops pause uh I'm back okay so we've got our edit session turned on or topology toolbar shown up and I suggest you go through the topology toolbar here and get a sense of the different tools that you now have access to there's going to be a key a couple of tools we're going to use one in particular is the fixed topology air tool and the other is the air inspector so let's go ahead and look at that air inspector and this is gonna open up a little table view at the bottom that's gonna allow me to list errors by air type so we had a couple different rules that we set and let's say we look at trails must not overlap I click that as an option right now I'm gonna turn off visible expand extent I want to make sure that I can get all the airs for all across the park and I'm gonna click search now and this will give me a list of all the airs for that rule and then in order to fix individual airs I can right click on one of these zoom too and find this airs where there's there's overlapping trails so this black part here the topology ears are gonna show up is kind of a pinkish color reddish pinkish color and then when they're selected they show up black so this is showing me this is a selected topology air and now fixing this so I know I've got an overlap so two lines that are coincident on top of each other and we said we didn't want to do that that kind of double counts there's a kind of a blind way that I could do this I could go to the fix topology air tool and I can right click on this feature and this tool is tries to be smart it's gonna adapt and give us different options depending on the air that it encounters and in this case it's giving us an option to subtract so remove the portion of the feature that is causing the air so it's kind of gonna fix it for us so if I go ahead and kind of blindly follow this and click subtract it's gonna ask this so there's two features here which one when you want to use I may want to look at the attributes to confirm one of the other is the appropriate one to delete I say okay and now that's been fixed and then sometimes you have to go and say validate topology and current extent and just to make sure that there's no errors that remain I'm gonna go ahead and undo that care and just to make a point here before you just blindly go ahead and fixed apology pairs often you want to zoom into that area and kind of get a sense of what's going on so it looks like I bet a trail intersection here and I got a few few of the things that are happening this may be an artifact of some of the GPS work that was done on the trails but I've got this little spur here that's probably not real if I measure some extent or some lengths here and I'm looking at something that's incredibly small excuse me units into something actually useful here meters 11 meters that's probably not a real spur trail here so I got a few of the things that I want to clean up besides even that's just apology air so in overall you know quality control I want to clean up that other problem too so it looks like that was appropriate for me to use the the error tool to delete that do subtract go ahead and do that again and then to fix this up here I'd want to turn on the editor tool and delete some of these vertices I may have another error here but let's see right-click need vertex and then click away now I've cleaned up that intersection all right thank you let's go back to our air inspector trails must not overlap say search now and I can keep going going down the list and fix these errors and get all of these hairs fixed so that's one way to approach fixing these errors if I go and look at one of the other examples only the rules trails must be inside boundary I search for one of those and give a quick look to one of those all right so here I've got a trail that looks like it's kind of skirting the park boundary now here's kind of a special case like I've got a couple options for this one is that I can try to move the trail inside the park like a pull up an air photo and see if I can find the trail in the air photo and whether not it belongs inside the park or any of the little trail segments that are outside the park I could delete but probably I want to keep this whole trail here if I'm making a trail map of the park if something just goes outside the park a little ways I don't want to have these segments of trail no trail and give the user the impression that there's missing trail segments so this is kind of a special case where I've got a line that's breaking the rule that I don't want to necessarily fix so we're going to use the topology fix topology or tool we're going to right click and for this case we're going to mark this as an exception we're gonna say this isn't allowed exception to the rule that I've just applied and so that's going to disappear as an error and we're going to keep it as an exception to our topology rules and that's also really common that we'd have to ecology rules that may apply to some parts of our data set but not the whole thing so that's an important lesson not to just blindly fix everything that some things may be in the real world allowed all right let's go to zoom to the next one okay here I got a trail that goes up to the park boundary and goes across and it looks like it just extends a little too far past the park boundary let's make one more fix here now if I go to the fix topology air tool and right click on this it doesn't know what to do here so it can tell is a break in the rule but it's just allowing me to market as an exception so in this case this tool is not going to allow me to fix this I'm gonna have to go and use the editor tools and let's zoom in a little bit and get rid of the vertices that are outside the park and I'm gonna move this one and make sure that it's snapping to the boundary all right I'm not getting a snap to the boundary so I need to go up to snapping and do edge snapping so I can snap to the into the boundary and there's the boundary edge I'm gonna turn off vertex Nemec so I'm just gonna snap to the boundary edge and there we go click away and now I have a trail that's fixed now here's a case where I still see this air and that's where I need to revalidate and now it's gonna revalidate and it's gonna see alright that's no longer an error so that's fixed so now I've fixed one of the cases where the trail goes outside the boundary and I've got it to where it stops right at the park edge yeah all right well that's kind of an overview of using the couple of the simple rules for our tools for fixing topology errors it gets more complicated and you're gonna need to look at the help files for some of this but that gives you a sense of what you're gonna do for some of this obviously before you quit save your edits save yard map session all right enjoy

Channel: Eric Compas

Views: 12,935

Rating: 5 out of 5

Keywords: ArcGIS, ESRI, geodatabase, topology

Id: bbxko7I-zuo

Length: 10min 7sec (607 seconds)

Published: Wed Feb 25 2015