Web 3d Terrain Presentation Authoring instructions for ArcGIS Portal 10.4 Local coordinate system

Original: Web 3d terrain Presentation Authoring instructions for ArcGIS Portal 10.4 Local coordinate system

Web 3d Terrain Presentation Authoring instructions for ArcGIS Portal 10.4 Local coordinate system

by Li Yuanxiang

ArcGIS Portal supports the three-dimensional presentation of the local coordinate system at the beginning of version 10.4, which is another step forward in ArcGIS product web3d. But the measurements found that there are some places that need to be noticed, not as smooth as using Web Mercator and network services directly.

???? The main test here is Terrain data display. Two aspects, one is the basic DEM data, for the entire terrain of the high and low fluctuation, in principle, do not display, the basemap overlay. It is the basic geo-basemap, which is usually the image data, which overlays the image with the DEM, resulting in a good stereoscopic display effect.

???? Because of the way the Web is loaded, 3D will not be able to load the image data and DEM data directly as the desktop side, but it needs to publish the two data into a service separately, with the same superposition principle.

???? The DEM data is published first. This is not simply to use ArcMap to load and publish, but to publish it as a ImageService service, which requires an image extension authorization for ArcGIS server. To do this, use the ArcMap catalog panel, expand the corresponding DEM, and right-click "Share as Image Service" as shown in

For the image service of the DEM, because it is a web-mode call, the image service must be sliced, and there are special caching requirements.

2. Because the data is a non-web Mercator projection, it must be published with the same projection as Arcgisonline, Microsoft Bing, and GoogleMap (which is the web Mercator projection), and hopefully the next version will be perfect. , in the cache option, select

   Because of this scenario, the tiling scheme is fixed and cannot be modified. If you want to be able to modify the tiling scheme yourself, you can choose to use the existing cached map/image service scenario, but here's the premise that these scenarios must be Web Mercator, and the cache requirements must conform to the 2nd requirement.

4. A strictly restricted tiling scheme. If you are using scenarios such as ArcGIS Online/bing/google, you can ignore this because these map services are already setting up the various caches and adjusting the tile level directly. However, if you want to customize, you must follow the following rules, that is, the scale of the cache must be twice times the next level. For example L0 is 1:20,000, then L1 is 1:10000,l2 to 1:5,000, there can be 1:8,000 such an irregular scale, otherwise the call overlay will prompt the cache rule is incorrect.
6. You must use the new Rule Lerc rule for the image service. Because it is web 3d, it is not possible to use image format as the original two-dimensional image, but to adopt new terrain slicing method. For example, set inside the advanced settings of the cache.

   When you publish, you are prompted to create the cache.

8. Once set up, you can share it directly and publish it to the portal. There is a special display in the portal, not the traditional map service maps Image layer, but a new service mode elevation layer, as shown in

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Basic geo-basemaps (which are typically imagery with terrain overlays, and regular slicing services are available) are also required for special processing. Load the data directly into ArcMap, and then you must do the following before you publish the diagram.

2. Modify the data frame's coordinate system to a Web Mercator projection. As shown, coordinates must be selected Wgs_1984_web_mercator_auxiliary_sphere

4. Tiling scheme settings. When publishing a map, there are also strict restrictions on the tiling scheme during the cache setup process. For your convenience, you can use the ArcGIS online/bing/google scenario. If it is customized, you must use the Web Mercator projection scheme, and its tile scale must be consistent with the slice scale of the DEM image service above (if not, the overlay will report an inconsistency of the tiling scheme directly).

6. after publishing the data in the portal, load the basemap. Load the published tile service as a basemap in the portal. It's easy to create a new map, such as adding a layer from the web in the add to the map, entering the address of the tiled Basemap service you just published, and checking the

   Save the map and share it in the group in the Basemap. such as

   So, There is a choice of local coordinate basemaps when using the Dem.

8. Log in to the portal, select Scene, and create a new local scene, as shown in

   In the Basemap, select the Basemap defined in the previous step, as shown in

   Clicking Add layer on the left adds the previously published DEM image service to the scene, adding it to see the entire terrain and image overlay. As shown

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Summary: The entire release process is summed up in the following points:

1. The description of the Web Mercator projection must be used when local coordinate data is published. The data itself does not need to be modified, just try to use the Web Mercator and other related scenarios when publishing, "spoofing" the system.
2. The tiling scheme must also be Web Mercator, and the slice scale must be strictly limited to twice times the next level, and the topographic service of the DEM and the tiling scheme of the general Basemap service are consistent.
3. To publish a DEM terrain service, you must have IAMGE server extended authorization and use the new tiling format Lerc.
4. The published base basemap (image tile map) must be registered in the base Basemap group of the portal in order to be called in the scene.
5. When displaying three-dimensional terrain, the scene must be created using a local scene. The DEM terrain service is not displayed, and the underlying basemap is displayed. Therefore, you must publish two services to truly view the three-dimensional terrain.

Web 3d Terrain Presentation Authoring instructions for ArcGIS Portal 10.4 Local coordinate system