在使用地理处理工具时,需要假定要素类的空间参考属性对几何计算和存储有效。 几何计算将使用 x,y 分辨率和 x,y 容差属性,如果未对其进行正确设置,则可能会导致性能下降、错误、崩溃或结果不正确。 建议您始终使用空间参考属性的默认值。 空间参考 将输入要素类的特殊参考属性设置为默认值。 将影响空间参考的地理处理...
When the cursor projects the features from one spatial reference to another, if the spatial references do not share the same datum, an appropriate datum transformation should be specified. The ListTransformations function can be used to provide a list of valid datum transformations between two spatia...
Your tables in the geodatabase do not need be in the same spatial references as the map you are adding them to, because on-the-fly reprojection of data from these tables is supported. However reprojection comes with a cost in drawing performance, and avoiding reprojection can help maximize p...
Can I work with two geometries that have different spatial references? No. When working with multiple geometries usinggeometry functions, their spatial references must match. The spatial reference of all geometries must match the spatial reference of the map or service executing the expression as well...
空间参考描述了要素在世界所处的位置。 大多数空间参考将采用地理模式(使用地理坐标系)或投影模式(使用投影坐标系)。 地理坐标系将使用地球表面的三维椭圆体模型来定义使用经纬度的位置。 投影坐标系将使用来自地理坐标系的信息并将其转换为平面。 每个投影将保留数据的某些方面(区域、方向、形状或距离),而放弃其他方...
Some of thenew features in ArcGIS Enterprise 11.2are in beta. Although this enables users to test-drive features and provide feedback to the product teams, beta features do not receive patching and are ineligible for Esri technical support. Limited support is provided via an early adopter co...
If your dataset does not contain a location field , you can enable location using coordinates, addresses, geographies, or standard boundaries. After you enable location, a new location field is added to your dataset. With a location field, you can create maps and perform spatial analysis with ...
CreateMapPoint(pointZM); // Has the same values including the spatial reference as pointZM builderEx = new MapPointBuilderEx(pointZM); // Has the same values including the spatial reference as pointZM // Do something with the builder builderEx.HasM = false; builderEx.ID = 7; // ...
. When publishing this workflow to ArcGIS Server, the data will be consolidated and moved to the server (if not referenced in the data store) and the service will hold a reference to the layers in memory. Within that service the tool will find and use layers through this nam...
not veering off on any unnecessary tangents. I would recommend using complimentary material to bolster your knowledge with regards to many of the aspects such as entity-relationship diagrams, indexing (both spatial and non-spatial),Pythonprogramming, theModel Builder, enterprise geodatabasesand ...