Latest Contributions by MelitaKennedy

‎06-30-2015

Do any layers have their visible scale range set? (right click a layer to check) Are you in data view or layout view? What's the scale set to when you zoom to full view? What value are you setting it to? How big an area are you showing?

‎06-30-2015

The central meridian on that picture looks like it's around 10E which does allow the Chukchi peninsula to stay connected to the rest of Asia. What do you want to do with the map? Plate Carree is simple and rectangular, but it doesn't preserve any properties. You might look at Goode's Homolosine (land-based option still preserve Chuckchi too) or Mollweide, or Robinson. Melita

‎06-29-2015

It corresponds to xy and z resolution values and is the minimum distance apart that two measure values can be. So if you have a measure value of 5.0001, you could have another value at 5.0002, but not at 5.00015. Because measures can be used for many different types of data, we just used the same default values that we use for the xy resolution and tolerance, which are based on using meters. Melita

User Conference Questions · ‎06-25-2015

My contact says that he plans to have it available the week of 7/13. There will be a notification with the Events email sent out about that time. Meanwhile, it looks like the app will be here: http://esri.force.com/eventappointments/RegistrationUC15

User Conference Questions · ‎06-25-2015

Simon, I'm checking. My colleague said that last year from what she remembers there was a site/app that was available about a week before the conference. She referred me to someone else, so I'm waiting to hear back. I might not have any info until tomorrow. Melita

User Conference Questions · ‎06-25-2015

I queried a TS colleague and she said, yes, appointments with Technical Support staff will be available.

‎06-19-2015

As the map says, it's GDAM version 2 which is available here. The map projection looks like Robinson. Look in projected coordinate systems, world. Melita

‎06-19-2015

Janice, you certainly should be able to. I'm not able to get 103180 nor 6318 to work, but was able to get 3690 and 4759 (the same but on NSRS2007) to work. When I checked the home page, it said the version was 10.04. You would need to find or create a geometry service that using a later version.

‎06-17-2015

Yes. Oh, you wanted more? Actively being worked on for next release in that other teams have either done some work or are discussing what to do. How much functionality will be there? I'm not sure yet, and can't give any details or my managers will be after me. Melita

‎06-11-2015

What version of the software? And as Dan asked, what coordinate system is the point feature class using? Also, buffer is distance-based, not area-based, so I wouldn't expect to see identical areas. If you used an equal area projection, then there would be some distance distortion to deal with. How big are the differences you're seeing? Melita

‎06-10-2015

It's a bug. Internally we could either refer to a "transformation" object or a "composite transformation" object. We switched over to treating both as a "composite transformation" (the first one has only 1 element) and broke the reporting of the transformation parameters on the UI. Melita

‎06-10-2015

We aren't doing vertical transformations yet. If the DEM is small enough, you may be able to calculate an overall offset using online geoid model converters. The UK one is OSGM02, online converter is here. If you have elevation heights (not heights above the ellipsoid), you may have to convert them back to ellipsoidal heights using the EGM96 model, then use OSGM02. Melita

‎06-03-2015

That's a very interesting question! We don't have an oblique version of the Lambert conformal conic which would be the best match. My next thought was possibly Hotine oblique Mercator or rectified skew orthomorphic (same but latter has a rectifying angle parameter). My next thought was to try the Krovak projection. It's an oblique conic, conformal that was designed for Czechoslovakia and is still used in the Czech Republic. The parameters are a bit of a mess, but I quickly threw together some that, to my eye, look like it's approaching (very roughly!) the picture in Snyder's Map Projections: A Working Manual on page 121. bipolar_equivalent Authority: Custom Projection: Krovak False_Easting: 0.0 False_Northing: 0.0 Pseudo_Standard_Parallel_1: 30.0 Scale_Factor: 1.0 Azimuth: 50.0 Longitude_Of_Center: -20.0 Latitude_Of_Center: 45.0 X_Scale: -1.0 Y_Scale: 1.0 XY_Plane_Rotation: 90.0 Linear Unit: Meter (1.0) Geographic Coordinate System: GCS_Sphere_ARC_INFO Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_Sphere_ARC_INFO Spheroid: Sphere_ARC_INFO Semimajor Axis: 6370997.0 Semiminor Axis: 6370997.0 Inverse Flattening: 0.0 Don't pay too much attention to the GCS. Snyder says that a sphere was used, but doesn't say which one. If the data/map does, you should use that information. A sphere with a radius of 6370997.0 is approximate the authalic sphere for Clarke 1866 (same surface area). Melita

‎06-02-2015

Hi Rusty, It's supported in ArcInfo workstation only (like the doc says) so it would work with coverages and grids. It has, honestly, a flaky algorithm that we would want to significantly rework if/when it was put in the projection engine used by ArcGIS for Desktop/Server/etc. As the Limitations say: The bipolar oblique conformal conic projection will display North America and South America only. If having problems, check all feature types (particularly annotation and tics) and remove any features that are beyond the range of the projection. I can remember one coverage that has a tic in the mid-Atlantic, the projection algorithm couldn't handle it. It's only been asked about every few years, so working on it has never made it high enough in our to-do lists. Melita

‎05-18-2015

I also received those drawing error messages. It could be there's some sort of formatting issue in the excel file. Maybe the dashes or spaces in the column headers? Everyone else has been giving good recommendations. Melita

My Ideas

Latest Contributions by MelitaKennedy

Re: Map disappears whnd scal is changed

Re: Need to create world map without dateline problem

Re: What is M-Resolution?

Re: Will there be the ability to make appointments with tech support staff as in previous years?

Re: Will there be the ability to make appointments with tech support staff as in previous years?

Re: Will there be the ability to make appointments with tech support staff as in previous years?

Re: World Globe Shape file

Re: I need help projecting NAD83 (2011) from stateplane to lat lon

Re: Convert WGS84 height to Ordnance Datum

Re: Buffer areas not the same

Re: Does anyone know why the transformation parameters are no longer provided in 10.3?

Re: Convert WGS84 height to Ordnance Datum

Re: Bipolar Oblique Conformal Conic

Re: Bipolar Oblique Conformal Conic

Re: Project a set of coordinates - points from an excel into a shape file with unknown coordinate system (map-match)

Re: Append(merge,copy,..) two point Layers (GPS G...

UC 2026 presentations and more!

Re: New XY layer from Lat Long (DD) not plotting c...

Re: EPSG release and ArcGIS Projection Engine

Re: EPSG release and ArcGIS Projection Engine

Coordinate Reference Systems

Alaska GIS Users