A brief introduction to polygonpro

Complete Game Information：

• 1 、How to use IDL to process Shapefile data
• 2、Several methods for turning planar roads into road center lines

How to use IDL to process Shapefile data

1. At present, there are two main types of satellite data used for remote sensing monitoring of red tides: one is meteorological satellites, which use their sea surface temperature data to detect the environmental temperature of red tides, and the visible light band is used to assist analysis; the other is water color satellite data, which mainly uses its visible light data to establish a chlorophyll model to detect plankton on the ocean surface.

Several methods for turning planar roads into road center lines

1. Use the extract road centerline function in the drawing tool to set the maximum width of the road, and then run it. The road is transformed into a grid and then automatically vectorized into a center line. This is a more complex but interesting method. The area road is transformed into a road center line through steps such as rasterization, binarization, and vectorization. Operation steps: Convert road surfaces to a grid format such as TIF. Binarize the grid into two colors (such as white and black).

2. There are four main methods to convert a planar road into a road centerline: Use the polygon to center line tool of ArcGIS Pro Steps: Make sure that the road vector polygon data has been placed in the file database, open ArcGIS Pro and create a new map template. Click on the toolbox, search and click on the polygon to center line tool. Load road surface data, set the output centerline to the database, and run this tool.

3. The road surface becomes a road sideline. Both ends of an open road sideline. Use the Extract Centerline tool, set the maximum width and run it. The resulting road centerline is displayed in subsequent steps. The last method is more complex and involves many steps: the road surface is converted into a grid and output in tif format. Binarization divides the grid into two types, with the value areas being black and the value areas being white.

4. Method 1: Use the "Extract Center Line" tool, which has high accuracy, but the data needs to be processed in advance in CAD to ensure continuity. Steps: Convert polygon data to line data; mark the first and end points of the section data; use the "Extract Centerline" tool to extract. Method 2: Convert the surface to the grid to extract the centerline, simplifying the work, but the accuracy is low, and the computer performance requirements are improved when the data amount is large.

5. Detailed steps for turning polygon into centerline in ArcGIS: Converting polygon data to centerline is a common geoprocessing task in ArcGIS, especially when processing linear features such as roads. Here is a detailed step-by-step guide based on ArcMap 3 for converting polygon data to road centrelines.