JMap Server Lima
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  • Welcome to JMap Server Lima
  • Administrator
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      • Resources: Spatial Data
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      • Resources: Metadata templates
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    • Installation Guide
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  • Applications
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    • JMap Pro User Guide
      • Introduction
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    • JMap NG User Guide
      • Introduction
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      • I Wish to...
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    • JMap Survey User Guide
      • Introduction
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      • I Wish to...
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  • Extensions
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      • I Wish to...
        • Edit Layers Geometries
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        • Perform Spatial Operations
          • Geoprocessing
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      • Configuring JMap Documents
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  • Developer
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    • JMap NG Developer Manual
      • Startup Options
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      • Examples
        • Start the JMap NG Core library
        • Start the JMap NG App
        • Add a JMap NG App extension
        • Toggle a JMap layer visibility
        • Add a layer to display custom data from GeoJSON file
        • Locate and select features by attribute query
        • Add an event on move end
        • Add attributions on the map
        • Locate and select feature by id
        • Locate and select feature(s) by location
        • Custom mouseover on a layer
        • Create a custom form in a div
      • Changelog
  • Knowledge Base
    • Knowledge Base
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K2 Geospatial 2024

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  • Buffer
  • Union
  • Intersection
  • Difference
  • Elementary polygons
  • Split polygon
  • Convex
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  1. Extensions
  2. Edition
  3. I Wish to...
  4. Perform Spatial Operations

Spatial Tools

PrécédentGeoprocessingSuivantExport

Dernière mise à jour il y a 7 mois

Spatial operations are performed on one or more selected elements.

A spatial operation results in a new geometry added to the Annotations layer.

When you perform spatial operations on editable elements, you can press and hold down the CTRL key to keep only the results of the operation, i.e. automatically deleting the editable elements that were selected.

Buffer

Creates a buffer zone around the selected map elements.

You can create the buffer zone for each element individually or a buffer zone for all elements.

  1. Select the desired elements and press.

  2. You must then specify the size of the buffer, i.e. the maximum distance between any point of the buffer and the selected elements. The size can be negative, in which case the buffer can be smaller than the selected elements. The size of the buffer is indicated in the map's unit of distance.

  3. Keep Generate a buffer for each selected element checked if you want this type of buffer.

  4. Specify the precision of the buffer arcs, in degrees.

  5. Press OK. The example shows a 100 m buffer around each park in a city.

  6. Uncheck Generate a buffer for each selected element if you wish a single buffer to be generated for the set of selected elements.

  7. Specify the precision of the buffer arcs, in degrees.

  8. Press OK. The example shows a 100 m buffer around parks in a city.

Union

Creates a new element by uniting the selected elements.

Intersection

Creates a new element that is the intersection of the selected elements.

Difference

Creates a new map element that is the difference between the first selected element and the others. In other words, all elements are subtracted from the element that was selected first.

Elementary polygons

Creates new elements resulting from the intersection of two polygons.

Split polygon

Creates new elements resulting from the splitting of a polygon using a line.

Convex

Creates a new element that is the smallest convex polygon that entirely covers the selected elements.

Select at least 2 elements and press .

Select at least 2 elements and press .

Select at least 2 elements and press .

Select the two polygons and press .

Select a polygon and a line that come from two different layers and press .

Select the elements and press .