Latest Contributions by DanEvans

‎03-19-2013

If you use 'Add All Values' when you're setting up your symbology, even blank fields will be included. In fact I think if you click on the blank value in the symbology tab in layer properties it will highlight a single space... If you don't want features with a blank value in that field to be symbolized, just remove that value from the symbology properties (and make sure '<all other values>' is unticked. Hope that helps Dan

‎12-07-2012

Hi, I have a table of incidents (gas service pipe escapes) that I would like to plot on our GIS. The data includes grid references in British National Grid projection, but unfortunately the data quality is appalling - everything from an 11-digit(!) X co-ordinate to 111111,222222 type nonsense to invented grid references that could be correct but are in completely the wrong location. With our mains escape data this is not so much of a problem as we have all mains digitised so (assuming the equipment ID provided is correct!) we can check to see if the grid reference provided is within the vicinity of that pipe, and if not assign that record a new grid reference that IS somewhere along the pipe (usually the centre or a certain percentage along the length of the line feature). However with services we don't have the pipes as geographic features to compare with. The service escapes data does however have an equipment ID, and assuming this is correct it is possible to extract some address data from our SAP system. So, I'm thinking, why not geocode the service escapes to the associated address point in OS AddressLayer2... Except, the geocoding tools that came with my copy of ArcGIS only have address locator styles for US addresses. There is also a product from ESRI (UK) called ProductivitySuite, which contains LocatorHub, which is supposed to be able to geocode to AddressLayer2 level out-of-the-box. It turns out we already have a site license for this. But I can't figure out how to do anything with AddressLayer2 using it, the 'Geocoding Wizard' with it only seems to work to postcode level, and wherever it asks for a Geocoding service, Gazetteer service or I think somewhere it says geocoding class as well, the drop-down menus are empty! I will ask our contact from ESRI about this next time he's in, although he assured me before it would be easy to figure out from the documentation (it's not!), but in the meantime, does anyone else have any experience using ProductivitySuite to geocode to AddressLayer2? Or does anyone have an address locator style for the UK so I can do this just using the built-in geocoding functionality? Or any other suggestions for how to achieve what I'm trying to do? Cheers Dan

‎12-03-2012

Could it be something as simple as one PC not having the MULTI_PART option set?

‎11-29-2012

*EDIT* If you have access to ArcMap: *EDIT* Another way in the meantime would be to get the OS Code-Point Open data (it's free) from http://www.ordnancesurvey.co.uk/oswebsite/products/code-point-open/index.html You get a point feature for each full postcode in the UK, simply join the data in your .txt or .csv file to it based on the postcode, selecting to only keep matching features, and your data is geocoded to full postcode level. You might need to play around with the codes as the OS data doesn't have a space between the incode and outcode where the first number has two digits, e.g. LS4 2DD and LS153EF. I've found the best way to do this is to create new fields for incode and outcode and use the field calculator to separate them before recombining them according to how your data is formatted. Hope that helps... Dan

‎08-02-2012

Hi, Joins and Relates as set through ArcMap in the layer properties are not published to ArcReader. If you want to retain joins when published you have to export the feature class to create a new feature class with the join already in place. If you use geodatabases and set up relationship classes, these will be published intact. So if you have ArcEditor or above it is possible to access the related "many" data through ArcReader, if you set up the relate as a relationship class. Hope that helps, Dan

‎08-02-2012

Hi, The ability to open a .pmf file in ArcMap has to be specified when the file is published. In the Publisher Settings dialog, on the Application tab, there is a check box: "Open in ArcReader only" which must be unchecked, and another: "Unrestricted access to contents of Published Map" ("Check this box to open the published map in any appropriate ArcGIS application") which must be checked. These settings reset to default so you have to set them each time you publish a map. Hope that helps, Dan Hola Rachel, I wanted to make sure I had understood your recent post. You are able to directly add a .pmf into ArcMap or drag and drop it into ArcMap, and then save it as a .mxd. I was asking because I just tested this work flow in 10.0.5 & 10.1, and I am not able to add directly a .pmf file (unsupported data format). If I attempt to drag and drop the .pmf file directly into ArcMap, I receive an error, so if you would please let us know your work flow. Gracias, Rachel! [ATTACH=CONFIG]16565[/ATTACH]

‎03-26-2012

Hi, The field calculator expression you want is something like: Round( [Acreage] , 2) Where [Acreage] is the field with the acreage in, and the 2 is the number of decimal places to round to. That's for VBA if you're using 9.3, I think VBScript in 10 is the same. Python is the same function Round() but I think you put exclamation points around the field name rather than square brackets e.g. !Acreage! instead of [Acreage]. Hope that helps... Dan

‎02-10-2012

I've used http://www.neuber.com/typograph/ this program before for managing and previewing fonts - might be what you're looking for? Hope that helps. Dan

‎12-12-2011

Hi Chris, Do you mean this http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//001700000032000000 tool? 'Add X Y Coordinates'? or http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000006z000000 ' Make X Y Event Layer'? The first one adds x and y coordinates to an already existing points feature class (not what you want). The second one will create a temporary points layer based on a table, which may be what you want, although if you're starting from an Excel spreadsheet you might have to convert it to a .dbf or geodatabase table first, or at least check that the field headings are 'safe' for ArcGIS. Usually if I'm plotting points based on XY data in a spreadsheet I'll use the 'Create Feature Class' -> 'From XY Table' right-click option in ArcCatalog, as this creates a permanent feature class rather than a temporary event layer. (I'm using 9.3 though, it might have changed in 10). Hope that helps Dan

‎08-29-2011

I forgot to mention I'm using 9.3 - is it still possible?

‎08-29-2011

Thanks David, I'll give it a try. Dan

‎08-26-2011

Hi, Is there a way to insert the grid reference/X Y co-ordinates of the centre of the data frame in layout view? I'm working in British National Grid projection... Cheers Dan

‎08-24-2011

I think it's because an event layer is just a temporary (in memory?) layer rather than an actual feature class, so you can't edit it... You need to export the data to a shapefile or a geodatabase first then it should let you edit it. Hope that helps! Dan I am simply trying to edit an event layer which has been created from a dbf, but am continuely confronted by the same error window (attached). This was a simple task in Arcgis 3.2 and 9.1 but for some reason is too much for 10. Can anyone suggest a remedy? Cheers, Chris

‎08-17-2011

Ok, what if you make a copy of your polygons layer, dissolve it into one multipart polygon and use the create random points tool on that? Or if create random points won't work with multipart polygons, create a new feature class with one polygon covering the whole extent of the polygons, and create the random points over that? Although if there are gaps between polygons some of your points would be between the gaps... I was going to say that you could then select only points intersecting your original polygons but then you wouldn't be able to specify an exact number of points within the polygons... hmm Although, looking at the help files I think my first suggestion will work: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000002r000000.htm If you are using a Constraining Feature Class that has more than one feature, and you wish to specify the total number of random points to be generated (as opposed to the number of random points to be placed inside each feature), you must first dissolve the constraining feature class with the Dissolve tool so it only contains a single feature, then use that dissolved feature class as the Constraining Feature Class. Hope that helps! Dan

‎08-17-2011

I have a shapefile composed of multiple polygons representing a vegetation class. I would like to sprinkle a specified number of random points throughout this vegetation class, not in each polygon of the class. I could only get 'create random points' to place a specified number of points in each poly gon of the shapefile, resulting in way too many points. Does anyone have a solution? Divide your specified number of points per polygon by the number of polygons in the feature class and use that as the specified number in the create random points tool?

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My Ideas

Latest Contributions by DanEvans

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