First, the preparatory work
Install Water by note Universal Map Downloader , if not installed the software, you can Baidu "water by note software" to the official website download.
Install one of the ArcGIS series versions here, take ArcGIS10.2 as an example.
Second, download the map
The first thing you need to do is download the Google satellite map.
start water through the note Universal Map Downloader, zoom to Chengdu Tianfu Square, click on the "box select Download Area", box select Tianfu Square approximate area, double-click the download area, select the series,as.
in the Level list, you can choose any level, but generally the city chooses level 19, the suburbs choose level 16 than the ideal, but before the choice of levels, it is best to check the online map to see if the level of data you want to download, here we take the 19 level for example. After selecting a good level, click OK to start the download.
when the download is complete, a dialog box asks if you want to export now, select Yes, and then display the Export Picture Data dialog box.as shown.
in this dialog box, you do not need to make any settings, click the "Output" button to export the data by default parameters.
The default export path is "D:\SGDownload\ Chengdu Tianfu _ stitching [Default]\l19".
Iii. 80 coordinates in ARCMAP and measurement of area
Open the image in ArcMap,as.
Convert projected coordinates
Open Arctoolbox, select the "Project Raster" tool,as.
selection of the output coordinate system
because the image we downloaded is roughly 104E, so here's the choice:
Xian 1980 GK Zone 17 (6 degree with Xi ' an 80 coordinate system, central longitude longitude 117, horizontal axis plus band number)
Click OK, output the converted image, reload into ArcMap,as shown.
Measurement
Open the toolbar and select the Measurement tool
select face measurement to begin measuring the area of Tianfu Square
display area is: 27487 square meters.
This completes the operation of the Google satellite map to transit 80 coordinates in ARCMAP and measure the area.
How to turn Google satellite maps into 80 coordinates and measure area
