Latest Contributions by DavidBlanchard

This is a known issue, the ArcGIS Online team is working on a patch/update that will hopefully be applied in the coming weeks. The current workaround is to allow anonymous access: Log in to ArcGIS Online as an administrator Go to My Organization --> Edit Settings Under Security, check the "Allow anonymous access to your organization's website". ... View more

The map document will get the Coordinate System of the first layer added. If you add the Esri World Street Basemap, this will set the document to "WGS 1984 Web Mercator (auxiliary sphere)". If the data you add is not in the exact same coordinate system, you may be warned of this since accuracy may be reduced when projecting on the fly. If you are using low-accuracy data or simply visualizing the data, you probably don't need to worry. If you need higher-accuracy, then you can: Project the data Set the data frame to the data's projection (this will warp the basemap) Set a transformation in the data frame properties (if applicable) As to why you only get the error message once, ArcMap will only warn you once when you add data of a different projection. The second dataset you add will not always generate a warning. ... View more

You will have to filter your list of fields produced by arcpy.ListFields() using the properties of the Field object. If you need help on filtering your list, the Dive Into Python guide has an excellent chapter on this: 4.5. Filtering Lists. ... View more

The "Impossible d'acquérir un vérouillage" message indicates that something else is using the table you are trying to update and ArcPy is unable to acquire an editing lock. This may be ArcGIS for Desktop (if open in ArcMap or ArcCatalog), or by ArcGIS for Server if published as a service. If this is the case, close ArcGIS for Desktop, or stop the service. If none of the above apply, it could be Python itself. This could occur if you are attempting to open multiple cursors on the same file, if you are not deleting the cursor once done, or if you script crashed and never got a chance to delete the lock. If this is the case, you may want to look at using the with...as...: syntax with a Data Access cursor. This clears your cursor once the script stops (including after a crash). ... View more

The difference between the two lies in the geocoding process. The address you provide is broken up into multiple representations of that address. For example, "12 Concorde Place, Toronto, ON" could have the following representations: 12 Concorde Place, Toronto, ON Concorde Place, Toronto, ON Toronto, ON ON Each representation is searched for in the address locator (or in some cases against many locators). Each search produces a list of candidates, each having a match score. This match score represents how closely the search string matched the value in the locator. These candidates are then ranked against each other according to their match score and the accuracy of the locator/representation. Continuing with the example from above, both "12 Concorde Place, Toronto, ON" and "Toronto, ON" could generate a match score of 100 since the full address was matched to a street address and the city was matched against a point or polygon for the city. However, the street address match is clearly superior and would get a higher candidate score. This is just one example of what could affect the match and candidate score, but it should help you wrap your head around this obscure concept. ... View more