In the following example graphics showing streets and parcels, you can see the SnapTips with the layer name and the snap type. When creating a new road, snap to the existing endpoint Streets: Endpoint so the segment connects to it.
If you need to create a building footprint at a parcel boundary, snap to the Parcels: Edge. On the Snapping menu, you can enable snapping to an intersection, segment midpoint, or curve tangent point. These additional snap types are only available with the new snapping environment. For example, intersection snapping allows snapping to locations where two features intersect but there may not be any defined vertex or endpoint there. You might use intersection snapping when you are adding points at street intersections or dividing a feature where it meets another feature.
When you have traced across the park, snap to the other intersection and finish the sketch to cut the park into two features. Since you can snap to any visible features in a layer, you may need to spend some time authoring your map.
By turning off unnecessary layers, disabling certain snap types, setting layer scale ranges, and making sure your labels and symbols are as descriptive as they can be, you can use the Snapping toolbar more effectively. Classic snapping Classic snapping is the snapping environment that you may be familiar with from ArcGIS 9.
Classic snapping is available to you in cases where you need more control over the way snapping occurs or if you are working with a part of ArcGIS that uses only classic snapping, such as tracing with the ArcScan for ArcGIS extension and editing in ArcScene and ArcGlobe.
However, georeferencing tools, the Measure tool, and other non editing tools continue to use the snap settings on the Snapping toolbar. Classic snapping allows you to manage the individual snapping types, layers, and priorities. In classic snapping, snapping settings are specified for each layer and type vertex, edge, or end in the Snapping Environment window, which you open by clicking the Editor menu, pointing to Snapping, and clicking Snapping Window. No snapping occurs until you check some boxes in the window.
You can drag and drop layers up and down the list to change the snapping order; layers at the top will be snapped to before layers further down the list. To snap to points, check the Vertex box since there is no specific point snap type in classic snapping.
To set options for classic snapping, click the Editor menu, point to Snapping, and click Options. From there, you can change the snapping tolerance in either pixels or map units and turn on SnapTips, which are off by default. SnapTips with classic snapping cannot be customized they will always show the layer and type and are opaque yellow, rather than the semitransparent SnapTips available with the Snapping toolbar. This tip applies to any toolbar in ArcGIS.
To set options for working with snapping, click the Snapping menu and click Options. From there, you can set the snapping tolerance in pixels, which is the distance your pointer needs to be from a feature for snapping to occur, or customize the snapping feedback. You can change the color of the icon and the content, font, and color of SnapTips. When you are working over imagery, add a background to the SnapTip to place a solid fill behind the text so it is easier to read.
Your snapping settings apply to all your ArcMap sessions since they are saved in the registry for the application. If you have multiple snap types active, the sequence in which the snapping occurs is determined automatically. The highest priority is given to snapping to sketch elements.
Snapping is useful with many editing operations, such as creating polygons that do not overlap or have gaps between them, drawing lines that connect to each other, or placing a point exactly along an existing line.
For example, suppose you are creating a new segment of an electric line that begins from an existing transformer; you want to ensure that the vertex of the line connects precisely to the transformer. Snapping makes this type of task accurate, quick, and easy. You can snap to any feature layer in your map, not just ones you are currently editing. This allows you to snap to features in a CAD drawing, coverage, feature class from another geodatabase, and so on.
Snapping can also be used to move a feature to an exact location in relation to another feature. For example, you can move a parcel and have one of its corners jump, or snap, precisely to a corner of another parcel. Simply move the parcel's selection anchor to its corner vertex after setting the appropriate snapping properties. Then move the parcel to its new location until the selection anchor snaps to the corner vertex of the other parcel. On the Snapping menu, you can enable snapping to an intersection, segment midpoint, or curve tangent point.
Intersection snapping allows snapping to locations where two features intersect but there may not be any defined vertex or endpoint there. You might use intersection snapping when you are adding points at street intersections or dividing a feature where it meets another feature. If you need to split a park where a stream crosses it, you can turn on intersection snapping, then select the park polygon, click the Cut Polygons tool on the Editor toolbar, snap to the first intersection, and use Trace to follow along the stream's edge.
When you have traced across the park, snap to the other intersection and finish the sketch to cut the park into two features. When you are editing, there are two snapping environments available to you. Snapping 1. A function of automated mapping software that makes two lines meet mathematically during the digitizing process. This is used to ensure connectivity be tween lines when it cannot be verified visually. The process of moving a feature to coincide exactly with coordinate s of another feature.
Snapping Environment - Defines when snapping will occur, and how features relate to each other. Snapping allows new features to relate to existing features in the same or different layers.
Statistics - Study of mathematics dealing with the collection, analysis , and interpretation of numerical data.
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