ChrisDonohue__GISP的最新贡献

莎莉·沃恩有一些不错的观点。一些补充的评论:在我工作的城市，我们有乡镇部分范围的信息，但它是一个单独的功能类。根据需要，您可以对其进行空间连接以找出特征所在的位置，因为理论上资产不会移动。我们发现这比尝试将其硬编码到特性类中要有效得多。在某种程度上，在特性类中硬编码是多余的数据。这让我产生了一个想法，让我回顾一下。您的市政当局是否有企业地理数据库，或者他们是否使用文件地理数据库/Shapefiles等?了解这一点也将在一定程度上决定你在想出最有效的系统时所拥有的选择。例如，在企业地理数据库中，设置子类型来帮助对数据进行分类是相当容易的，此外，通过将类别限制为仅有效的值，这有助于限制输入错误。子类型简介- geodatabases | ArcGIS Desktop还有，谁会使用这些数据? What for? For example, will it be hosted to a web service? Will other systems be tied into it? Who are the downstream users and what are they/their systems expecting as input? Knowing that will then provide options and constraints for how one sets this up. At the City I was at, we didn't try to come up with one universal unique ID for everything. Instead, we had unique IDs for each feature class. So I guess part of figuring this out will be determining the business need for one big universal ID. It may be that its very needed. But it would be good to know the why before moving forward. I would dig a bit more to find out the rationale more. It may be that somewhere in your organization there is a non-GIS data consumer that reads the GIS data from a linked system and needs the proposed ID to be able to do its process (and has little capability to be adjusted). I was often surprised at the City that even after working a few years there that I would discover there were systems using our data that we had never even heard of. We would propose changes, conduct outreach, go through a review process with all the City departments, then once we implemented even a small change (like eliminating one obsolete zoning code) someone call us from out of nowhere and ask why the data was broken now. Even my boss, who had been there many years, who knew everyone and everything going on in this mid-sized city government, would often be surprised. So ask around. And then ask again. Seriously. Don't expect to be able to see the whole picture in one day. It may take asking many people in various parts of the city over a period of time to get the full picture. Anyways, keep at it. That's my 2 cents. Chris Donohue, GISP …查看更多

其次，我发现人们以许多不同的方式使用这些术语，这可能会增加混乱。特别是休闲用户和新用户。其中一些术语确实有多种用途。例如，即使是专业人士也会使用术语“层”来描述不同的事物。它们可能指的是地图布局中的许多特征类或实际的图层文件(.lyr)，这些文件控制着这些特征类在绘制时的描绘方式。在这一点上，一个人必须知道上下文来理解层的含义(或要求确认)。克里斯·多诺霍，GISP …查看更多

我可能应该说“大约3米的精度”更精确，否则人们可能会认为这是一个绝对的精度声明。澄清一下，W3W系统是在3米网格单元的基础上工作的，但这并不意味着它的精度正好是3米。此外，我希望人们不要认为W3W系统以某种方式使GPS导出的位置更准确。它不是。定位方面的关键点在于，W3W通常比常用的三角测量方法提供更好的精度。请注意，三角测量不使用GPS作为其定位的一部分。因此，W3W提供的潜在改进归结为手机上的GPS与三角测量精度的比较(是的，几乎总是不是测量级别的)。在这种比较中，GPS通常会胜出(即使有一定程度的不准确性)。例如，W3W可能会将你放置在与你实际位置相邻的3米方框中，但这通常比三角定位更接近你的位置。所以至少在准确性方面，它有一些好处。 By the way, I am not saying this is a perfect system and that everyone should run out there and buy it. But as a person who does addressing, it is an interesting (and at times whimsical) alternative to traditional US addressing systems. Chris Donohue, GISP …查看更多

另一个选择:Identity-Help | ArcGIS桌面版虽然Union和Intersect可能更容易上手。克里斯·多诺霍，GISP …查看更多

这里有一个方法来解决这个问题。你可以在ArcMap文档的目录中复制一个图层，然后在地图中显示完整的图层，并在图例中使用一个简化的图层。首先，在目录表中复制该图层。注意，这都是在最终地图布局的目录中完成的(我们没有修改或复制磁盘上的实际文件)。然后对于该副本，进入目录中的属性，然后在图例符号区域删除您不想出现的项目(在您的情况下填充的地方)。当你在属性中，添加一些东西到图层名称是有帮助的，这样你就可以把它和原来的区分开来。例如，如果图层名称是PlacesOfInterest，我会将其修改为PlacesOfInterestLegend。然后勾选该图层在目录中的显示(但保留原始图层勾选)，因此只有原始图层被显示。最后，为了完成这个，在布局中找到你的图例框，右键单击它，然后在图层列表中添加你修改过的图层。在我的例子PlacesOfInterestLegend中。 Remove from the list the original layer. Note that you may need to set the Property in the legend box that controls display of layers that are not turned on, as this may suppress the legend layer you just made. Chris Donohue, GISP …查看更多

您可以分别为每个数据帧添加书签。为此，右键单击目录中的数据帧并选择“激活”，然后设置视图并创建书签，从而“激活”数据帧。给它一个独特的名字是很有帮助的，因为在处理具有多个布局的地图时，很容易不知道哪个框架是活动的。例如，将主地图书签命名为“main map”，将定位器地图书签命名为“Locator map”，等等。帮你复习地图的小窍门。一旦你有你的地图设置了多个帧，每一个书签到确切的最终比例，这是有帮助的，在布局模式后，首先点击布局工具栏上的1:1按钮检查它。然后使用布局平移工具移动。这将显示最终的外观，除非使用不同的打印机在颜色和线重上有轻微的变化。克里斯·多诺霍，GISP …查看更多

当在ArcGIS Desktop中创建用于打印的地图时，我通常将参考比例尺设置为适合布局视图的比例尺，然后将视图添加书签(在布局视图中)，以便它显示所需的完整地图输出。然后，如果你想放大一些东西，使用布局视图缩放工具，这样你仍然在缩放(而不是标准的缩放工具)。书签可以方便地将地图返回到正确的比例和对齐，一旦你完成了它，你可能经常需要平移/缩放，因为你检查地图和标签/注释它。然而，我不确定这是否解决了你正在寻找什么?你是否真的需要像Scale Dependency这样的东西?这将用于您希望仅以特定比例显示信息的实例。http://desktop.arcgis.com/en/arcmap/10.5/map/working-with-layers/displaying-layers-at-certain-map-scales.htm克里斯·多诺霍，GISP …查看更多

对于初学者来说，在查看数据方面，您是否可以检查ArcMap中Table of Contents中设置的坐标系，看看它是否符合预期?(右键单击目录中的图层，然后单击坐标系统选项卡)。目录继承了加载到它的第一层的坐标系统，所以确保它使用的是你期望的那个。另外，检查DEM的坐标系统，看看这是否是所期望的。您正在使用的一个或多个层可能没有专门分配的坐标系统，因此它们是“自由浮动的”，而是依赖于底层的目录坐标系统来对齐。如果每种情况下的坐标系统都是正确的，那么就会想到其他可能性:对于第一个问题，如果当前使用的坐标系统不在0到360的范围内，则可能需要使用自定义的坐标系统。对于第二个问题，问题可能是在XY数据转换中没有对坐标系统进行正确的分配。确保在运行转换时指定适当的坐标系，以帮助避免问题(许多人忘记这样做)。添加x,y坐标数据作为一层-帮助| ArcGIS桌面克里斯多诺霍，GISP …查看更多

不过，还有一幅更好的画。组合。免费的食物、啤酒和葡萄酒!克里斯·多诺霍，GISP …查看更多

如果这对您有所帮助，我将抛出我有时用于有问题的地图的实用方法:将您想要标记的功能类转换为文件地理数据库中的功能类。向这个名为“LabelProcess”或类似的特性类添加一个文本(字符串)类型的字段。3.将地图设置为Layoutview，并设置所需的比例和需要显示的所有图层。4.确保Maplex处于激活状态。5.开始标签。在Maplex中播放设置，直到您获得大多数可能的标签看起来不错。 6. Select all features with labels that worked. Using Field Calculator, calculate the "LabelProcess" field to now include the attribute "Maplex Only" or similar. 7. Copy the feature class you are labeling off of in the Table of Contents so you now have 2 listed. 8. For one of them, set a Definition Query so that it just displays the ones that are "LabelProcess" field = "Maplex Only". 9. For the other one, set a Definition Query so that it just displays the ones that are "LabelProcess" field <> "Maplex Only". 10. Turn off the feature class with that is based on "Maplex Only". 11. On the one that is <> "Maplex Only", try a different combination of settings. For example, consider allowing the label to be rotated, using a leader line, reducing font size, splitting the label into more than one line, etc". Turn on the other layer to make sure there will be no overlap or other visual conflicts. 12. Once a batch of these work, select the features and then using Field Calculator populate the "Label Process" field with a good descriptive name. 13. Copy the feature class being labeled, set a Definition query to be equal to the latest description. 14. Update the Definition Query of the labels that still don't have a good solution to cull out the ones that worked in the last step. 15. Continue the above steps until you get to a point where Maplex will no longer effectively label features. At this point, one will have to switch gears and manually label these. 16. Convert this last batch to annotation, making sure you only are exporting the ones that have do not have a sucessful label from an above process. Then manually align, rotate, add leader lines, etc. 17. As a final step, turn on all the copies of the feature class in the Table of Contents, along with the Annotation created in the last step. Ensure that it all fits well together. There may may another cleanup step here if some things work well individually but not together. Example: A leader line generated in one step overlaps a label for another step. 18. Note - if it is possible the map will be shifted in extent after doing all this, it may be worth it to do an additional step and blow out all the labels to annotation layers. This will "fix" them to one spot, whereas labels tend to "float around" somewhat due to Maplex if the map is shifted, which can cause visual conflicts. I use this approach on large complex maps with many labels and challenges like a variety of polygons sizes that need to be labeled. For example, we have a poster-sized citywide Zoning map where every polygon needs to be labeled clearly with the zoning designation, and the polygons vary in size from a 70 square feet to several thousand square feet. There are areas with many "small" polygons with different zoning designations all closely lumped together besides areas of large polygons, so pure Maplex or Standard labeling is ineffective. Manually labeling all 1,400 polygons is a bit tedious, so this process helps use the power of Maplex to do the bulk of the labeling and then saves just the "troublesome" labels for the more time-consuming manual processing. Chris Donohue, GISP …查看更多