Data published as a feature layer must reference a single source geodatabase or database. You cannot publish data from more than one database connection in a single map.
In ArcGIS Pro, if you were to publish the data in a map as a map image and feature layer and there are multiple data sources referenced in the map you will get an error: ‘00062: Map contains data that does not use the same connection to an enterprise geodatabase’.
Web feature layers associated with a map image layer require that all layers and stand-alone tables in the service reference an enterprise geodatabase or a standard enterprise database using a single connection.
Data published only as a map service can come from multiple data sources. While it is possible to enable feature access on a map service after publishing, only the layers from a single data source referenced by the feature service would be accessible.
Esri Australia has been working with Esri and ICSM to ensure that the ArcGIS system can support clients migration from the GDA94 static datum to GDA2020 static datum. The ArcGIS system now fully supports data transformations via 7-parameter similarity transformation, or NTv2.0 transformation Grids.
As a result we are now seeing many clients migrate their authoritative datasets to GDA2020 and requiring all delivered data is in this same static datum. State and national governments are now delivering foundational open datasets in GDA2020 as well
In parallel to this migration we are also seeing more clients taking up WebGIS and delivering data via web services instead of shipping datasets or producing PDF’s. This is enabling a greater uptake web and mobile GIS, providing better informed field operators and getting live data in the hands of people who need it as they need it.
These two waves of change have presented a significant challenge. While transformations existed between WGS84 & GDA94 and GDA94 & GDA2020, there existed no direct path from GDA2020 to WGS84. If you wanted to place GDA2020 data into WebGIS you had to transform you data back through GDA94 to WGS84. Effectively moving the data back to its old location prior to publishing. Many clients asked why????
It has been termed the WGS84 Projection dilemma. So what’s changing?
In ArcGIS Online Map Viewer, all layers in a web map inherit the coordinate system of the basemap. WGS 1984 Web Mercator (auxiliary sphere) is the spatial reference of basemap services in the default Esri basemap gallery, meaning this is the default web GIS coordinate system. Layers also have their own spatial reference and transformations defined at a service level. When you add layers to the Web Map Viewer, an on-the-fly reprojection is performed to align your data with the coordinate system of the basemap.
When publishing data to web GIS you need to consider what spatial reference will be used to store the data at a service level, how the publishing process may affect it, as well as what transformations (or lack of) will be applied when the layer is displayed in a web map with a datum.
It is also important to understand GDA2020 and its relationship with web GIS. The de facto WGS84 in web GIS brings some challenges not unique to Australia or ArcGIS. Failing to address these challenges may result in data misalignment.
You’ve purchased an ArcGIS Student license; now, how do you to use it?
This is your one-stop-shop for getting up and running with your new ArcGIS for Student Use subscription. This blog will step you through each stage of the setup process, using the following FAQs as our guide:
Whenever a user runs into some sort of problem with the GIS system, one of the first things to look at would be the relevant logs. These give a more detailed insight into what is happening and where potential problems were encountered. This post will explain exactly how to obtain every type of log in the ArcGIS Enterprise stack.
ArcGIS applications are built with the assumption that the feature’s geometry follows certain specifications. When the processing algorithms encounter data that does not follow the specifications, the software can perform poorly, generate errors, crash, or the operation may succeed without an apparent problem but generate incorrect results.
Repair Geometry Geoprocessing tool
The Repair Geometry tool inspects each feature in a feature class for problems with its geometry. Upon discovery of a problem, a fix will be applied, and a one-line description will identify the feature, as well as the geometry problem that was fixed.
A new feature introduced in ArcGIS Pro 2.7, is GNSS (GPS) location support. You can now connect a GNSS device to ArcGIS Pro to assist with feature creation and navigation within a map or scene. In this article, I’ll provide an overview of this new feature, then discuss some hardware considerations for working with GNSS.
Supporting Imagery and Lidar in the ArcGIS platform has been around for a long time. In the ArcGIS Server Space, Image Server became available at 9.3.1. Since then it has evolved to Mosaic Datasets, Image Services, Raster Functions and now raster analytics. Now imagery is really an integral part of the ArcGIS platform. However, it is only as performant when the imagery is managed and configured optimally.
In the Imagery formats and Performance section it details topics such as:
File format suitability
Recommended imagery formats
Working with large mosaics
Storage system performance
If you’re going to be managing imagery and lidar I recommend you reads these documents. They are comprehensive and invaluable. I must admit I have been doing this for 12 years now and there is information on Lidar management that I did not know about.