https://mp.weixin.qq.com/s?__biz=MzU0MDQ3MDk3NA==&mid=2247560279&idx=5&sn=8ac52cabeb8c7e3b2c083e07ef6056da&chksm=fb3b1786cc4c9e909bab16dd99 e88e5f5f9816eb2349d6d73a68a137a5264aa606b2035d7b3e&token=1674760816&lang=zh_CN#rd1. Calculate the area (can help us calculate the area of small classes)
Add the AREA field, then right-click the field column, and then click CALCULATE VALUES; ---> Select ADVANCED --> Enter the following code, then write OUTPUT at the bottom = and click OK.
Dim Output as double
Dim looks like Iarea
Set pArea = [shape]
Output = pArea.area
2. Calculate the length (can help us calculate the length of the forest belt)
Add the LENGTH field as above, then right-click the field column, and then click CALCULATE VALUES; ---> Select ADVANCED --> Enter the following code, and then write OUTPUT at the bottom =. Click OK and it's OK.
Dim Output as double
Dim pCurve as ICurve
Set pCurve = [shape]
Output = pCurve.Length
3. Small classes in ascending order:
Add the small class number field as above, then right-click the field column, and then click CALCULATE VALUES; ---> Select ADVANCED --> Enter the following code, and then write OUTPUT at the bottom =. Click OK and it's OK.
Static i as long
Dim Output as string
i=i+1
Output =i
4. Small classes for dividing village boundaries
Select -> Select based on location, small classes are crossed by the outline of village face, then select -> Set selectable layer to village face. Use the tracking tool, the task is to cut the polygon features, and perform the cutting
5. Field assignment
Select -> Select based on location, small classes are within the village. Open the attribute table to display the selected one, select an entire column to calculate the field value, assign a constant or to the entire field, and check the Advanced Add Variable Code
6. Topology check
ArcCatalog, right-click on the folder to be checked for topology -> Create a new personal geodatabase -> Create a new feature set -> Import feature classes -> Create a new topology (import the layer to be topology). Open the file generated by topology rules in ArcMap, and use the error record information given in the topolopy toolbar to modify it in the editing state. Search for the error you want to modify -> right-click (pan to) and select Fusion or New, etc. (Use the P+ENTER key combination to speed up the modification). After modification, right-click the layer name -> select Export Data
7. Projection and projection conversion
ArcToolbox->Data Management->Projection and Projection Transformation->project, batch project. Please pay attention to more useful information: GIS Frontier (create a custom geographic transformation file before adding geographic transformation)
8. Merge layers
ArcToolbox->Data Management->General->merge
9. Convert files in other formats to shpfile
ArcToolbox->Conversion Tool->to shpfile
10. Convert dxf to shp in batches
Use ArcCatlog to open all, select right click and convert to shp
11. Define projections in batches
ArcToolbox->List->batch define coordinate system 9 (can be used to correct deviations in satellite films in batches)
12. Correction
Capture option correction can be selected in advance for affine correction
13. Multiple queries of attribute table
"Village" =6 AND( "dominant tree species" = '150 larch' OR " dominant tree species" = '491 elm' OR " dominant tree species" = '530 poplar' OR " dominant tree species" = '535 willow' )
14. Database hooking
Connect the library file according to the same fields and values of the two attribute libraries (only the common fields with the old library are retained in the new library. The editor must be opened when Arcgis is connected. After the connection is completed, the data needs to be exported to generate the result file. Note: Export from Arcgis When modifying data in an excel table, it is easy to serialize it. At this time, you only need to keep the common fields in the two tables, and then use the above method to hook the database back. The linked library will replace the content in the same common fields)
Note: Generally, the public fields are obtained by using township * 1000000 + Lin class * 1000 + small class number. The original table can add fields in Arcgis and then calculate the field values. The database to be connected can add fields in VF. Use repl public field name with township*1000000+lin class*1000+small class number all to fill in.
15. Cutting
Use rectangles to clip raster data: In ArcToolbox, select the clipped raster data in datamanagement>raster>clipInputRaster and set the four vertices of the rectangle.
16. Deletion and integration of small classes
Internal deletion of a small class is equivalent to reducing the area, and external deletion removes the plot. The internal integration of small classes is equivalent to the same area.
17. Image map registration in ArcGIS (correction of scanned maps)
Raster registration - add control points based on map coordinates, x= longitude, remove the first two digits and add 3 zeros, y= latitude, add 3 zeros (for example, 21575 is 575000, 5357 is 5357000). Select the quadratic polynomial, select correction, and select the corrected data type and name.
18. The first layer added to the ArcGIS project spatial reference.
19. Field values display different colors
After opening the layer, right-click the layer, in the properties, symbology, use categories, use unique values, select the "attributes of the patch" you mentioned in the value field on the right, and add all values
20. Convert between line layer and area layer
Data Management Tools->Features->Features to Polygons, Polygons to Features
21. After fusion, everything will be scattered.
ArcToolbox->Data Management->Properties->mergemultipart to singlepart
22. Layer relationship processing
ArcToolbox->Analysis Tools->Overlay->Erase (Layer erasure refers to erasing the features in the input coating covered by the reference layer according to the range size of the reference layer.)
ArcToolbox->Analysis Tools->Overlay->Update (The attributes of the part of the input layer covered by the correction layer will be replaced by the attributes of the correction layer. Note that the input layer must be transparent when updating)
ArcToolbox->Analysis Tools->Overlay->Symmetrical difference (obtain the image of the two layers after overlaying and removing their common areas. The properties of the newly generated image are also generated by combining the properties of the two layers)
ArcToolbox->Analysis Tools->Extract->Clip Get the data of the input layer in the clipping feature area
ArcToolbox->Analysis Tools->Overlay->Intersect The intersection operation is to obtain the intersection of two layers through overlay processing, and the properties of the original layer will be displayed in the new layer obtained at the same time.
23. Selectively export data to generate new layers
Select the data to generate a new layer, right-click the source layer, data, export data, select the selected features, modify the layer name, and OK (the same applies to selective export of dbf files)
24. ArcGIS generates area layers and line layers based on coordinate points; and exports coordinate point files based on layer files.
ArcToolbox->List->Data Management->Create Features From Text File
Among them, input txt file selects the coordinate point txt file in the following format, Input decimal separator enters any character in English mode, but spaces cannot be used, Output Feature Class selects the output path, Output Feature Class Spatial Reference selects the coordinate system or The imported reference is an existing layer coordinate system.
txt file format description:
1. There cannot be a space after Polyline; (if you want to generate a surface, change Polyline to Polygon) 2. The space interval between data can only be one character; 3. Each point of the generated line must be arranged in order. Arranging in different orders will cause Generate different images; 4. The serial number of the first point starts from 0; (When the surface layer is used, the first point and the last point of each subclass are the same) 5. If you want to generate multiple lines, for each line must be numbered; and must meet the above requirements, the points of each line should be numbered again from 0; 6. END must be added to the last line; 7. After exporting the data from the EXCEL table into TXT format, adjust the data according to the above requirements format, create a new TXT document, and copy the data into the new document. 8. The coordinate data of each point must retain more than 1 decimal place.
The format must comply with the above requirements
As follows: Generate two small class plots on the same layer at the same time
Polygon
0 0
0 477140.900 268443.400 1.#QNAN 1.#QNAN
1 477186.300 268443.400 1.#QNAN 1.#QNAN
2 477186.300 268507.559 1.#QNAN 1.#QNAN
3 477186.300 268522.561 1.#QNAN 1.#QNAN
4 477192.300 268522.461 1.#QNAN 1.#QNAN
5 477192.300 268507.459 1.#QNAN 1.#QNAN
6 477192.300 268443.400 1.#QNAN 1.#QNAN
7 477263.900 268443.400 1.#QNAN 1.#QNAN
8 477263.900 268408.400 1.#QNAN 1.#QNAN
0 477140.900 268443.400 1.#QNAN 1.#QNAN
END
Polygon
0 0
0 700680 5247849 1.#QNAN 1.#QNAN
1 700676 5247846 1.#QNAN 1.#QNAN
2 700603 5247885 1.#QNAN 1.#QNAN
3 700609 5247891 1.#QNAN 1.#QNAN
0 700680 5247849 1.#QNAN 1.#QNAN
END
Generate line layer
Polyline
0 0
0 700680 5247849 1.#QNAN 1.#QNAN
1 700676 5247846 1.#QNAN 1.#QNAN
2 700603 5247885 1.#QNAN 1.#QNAN
3 700609 5247891 1.#QNAN 1.#QNAN
END
25. Copy the layer file in the content list area
Copy all the layer files in the content list area of one open project to the content list of another open project. In the content list area of the source project, right-click on the layer file to be copied and select the layer file in the content list area of the target project. Right click on the layer and paste the layer file.
Twenty-six, shortcut keys
ALT+R keys and then S key can help you save layer files quickly. ALT+R and then the G key can also quickly fuse files. CTRL+F6 snaps to vertices, CTRL+F8 snaps to edges
Note:
The local forestry bureau has had electronic data in recent years, but some of these data are still in the "Beijing 54 coordinate system", which is different from the "Xi'an 80 coordinate system" that everyone uses now. If we want to use this part of the data as a reference, we can first perform a projection conversion of the "Beijing 54 coordinate system" into the "Xi'an 80 coordinate system" and then use the small class to perform registration with the image. We can get the "Xi'an 80 coordinate system" we want. The specific operation steps are included in the above operation method.
27. GPS and computer connection, data transmission, coordinate point mapping
MapSource client software and GPS driver installation
Install the driver and MapSource program, and connect it to the GPS using the data cable that comes with the GPS. (The driver and MapSource program are both in the CD that comes with the GPS)
MapSource parameter settings
MapSource Edit->Preferences->Location User-defined grid, user-defined map datum. Properties are set, and the specific parameter settings are the same as the local forestry bureau GPS parameter settings.
MapSource data receiving and saving
Transmit -> Receive from the device, generally select the waypoint to receive the content. File -> Save as save path file name, the file type is default .gdb (this is the GPS database and the data on the GPS device are consistent, you can unplug the GPS in the future and directly open this gdb file for operations, which is equivalent to connecting to the GPS operation); Likewise File->Save as .TXT file (txt form of gdb file).
Excel gets coordinate points
Data in Excel -> Import external data to find the saved txt file, next step -> select the delimiter, and then select "Spaces and Others" in the next step to confirm (the saved txt file is imported into Excel), where the Name column is the coordinate point number, Description is listed as the dotting time, and Position is listed as the coordinate point under normal circumstances, and the coordinate point is obtained.
Coordinate point mapping (divided into 1.0 mapping and ArcGIS mapping)
1.0 Image:
If the parameters are set strictly according to the steps in MapSource parameter setting above, the coordinate points can be directly displayed on the map. Create three new columns in Excel, namely id, x, y, where id is the common ID number of all coordinate points in the same plot of land (if the id values of the same plot of land are the same, both are set to 1, and the id values of the other plot of land are both Set to 2). Then use 1.0 points to form a surface or line and add the attribute library to get a layer formed by GPS points.
ArcGIS map:
It is described in detail in "Twenty-four. ArcGIS generates area layers and line layers based on coordinate points" above.
28. Another method of plotting coordinate points (requires Tools->Add XY Data)
1. Import the data into Excel. There are a total of two columns X and Y (the column names are X and Y). The following corresponds to the x and y coordinate data. Save the file as a *.xls or *.dbf file.
2. Under ArcGis, menu Tools->Add XY Data Tool (you can add multiple plots at the same time. Different plots are separated by blank lines. Import into Excel to edit the point numbers, then export the Txt file and edit it as an area layer. dot file). A new layer will be formed at this time, and all the points have been added. However, since the points added now do not have objectID or FID, the layer does not have most of the functions of the *.shp layer, such as point selection and editing. , association, attributes and other operations.
3. Right-click on the layer just generated, select data-expot data..., and export it to a .shp file.
4. Use the write features to Text file tool to generate a txt file. This file is mainly used to describe the coordinates and formatting of each point. Change Point to Polyline or Polygon to meet the connection generation requirements for lines and surfaces.
5. Use the Create Features From Text File tool to import the txt file you just generated and change Polyline or Polygon.
The TXT file format is as follows:
point
1 37374000 2516000
2 37375000 2516000
3 37376000 2516000
4 37373000 2515000
End
29. Central meridian, central meridian algorithm
Central meridian: The meridian in the middle of each 6-degree or 3-degree sub-zone is called the central meridian. Our country's territory spans 11 6-degree projection zones, namely the 13th to 23rd zones. Our country’s territory spans 22 3-degree projection zones, namely the 24th to 45th zones
6-degree zone central meridian algorithm: local central meridian = 6* local zone number -3. (Applicable to 1:25,000 and 1:10,000 topographic maps)
3-degree zone central meridian algorithm: local central meridian accuracy = 3* local zone number. (Applicable to 1:10,000 topographic map)
6-degree zones: starting from 0-degree meridian (i.e. 0-degree meridian), each projection zone has an accuracy of 6 degrees from west to east. The world is divided into 60 projection zones.
The local zone number = the local integer degree of east longitude/6. Take the integer and add 1. .
3-degree zone: Starting from the 1.5-degree east longitude, every 3 degrees, the world is divided into 120 projection zones. The calculation method of local zone number is the same as above
30. Gauss-Krüger projection
The Gauss-Krüger projection is divided into zones of 6 degrees or 3 degrees. Each zone forms an independent planar rectangular coordinate network. The straight line after projection of the central meridian of the projection zone is the X-axis (vertical axis, latitude direction). After equatorial projection is the Y axis (horizontal axis, longitude direction). In order to prevent the coordinates in the longitude direction from appearing negative, it is stipulated that the central meridian of each zone should be shifted westward by 500 kilometers, that is, the eastward pseudo-offset value is 500 kilometers. Since the Gauss-Krüger projection has The coordinates of a projection zone are all relative values to the origin of the coordinates of the zone, so the coordinates of each zone are exactly the same. Therefore, it is required to add a zone number before the horizontal axis coordinate, such as (4231898, 21655933) where 21 is the zone number, and the same is true The defined east pseudo-offset value also needs to be added with a zone number. For example, the east pseudo-offset value of zone 21 is 21,500,000 meters. The six-degree zone is divided into zones from west to east every 6 degrees longitude difference starting from the 0-degree meridian, and the zone numbers are sequentially numbered as zones 1, 2...60. The three-degree zone is divided into six-degree zones. Its central meridian coincides with the central meridian and sub-zone meridian of the six-degree zone. That is, starting from the 1.5-degree meridian, the zone is divided into zones from west to east every 3 degrees of longitude difference. The numbers are sequentially numbered into three-dimensional zones 1, 2...120. my country's longitude range ranges from 73° in the west to 135° in the east, and can be divided into eleven six-degree zones, namely the 13-23 zone. The central meridian of each zone is 75°, 81°, 87°, ..., 117°, 123°, 129°, 135°, or twenty-two three-dimensional zones. The six-degree band can be used for small and medium-scale mapping (such as 1:250000), and the three-dimensional band can be used for large-scale mapping (such as 1:10000).
31. Geographic coordinate system and projected coordinate system
Geographic Coordinate System (Geographic Coordinate System, GCS for short) and Projected Coordinate System (PCS for short). The projected coordinate system is a coordinate system used to project the three-dimensional spherical coordinates determined by longitude and latitude in the geographical coordinate system onto a two-dimensional plane according to a certain mapping relationship. Each projected coordinate system is projected from a geographic coordinate system. Projected coordinate system = geographical coordinate system + projection process.
32. Export the small class coordinate points of the layer and organize them
ArcToolbox->List->Data Management->Write Features To Text File (Export coordinate points from layer)
Among them, Intput Feature enters the layer file you want to export the coordinate points, and Output Txtfile enters the export path and file name (the file name must be added with a .txt suffix).
The export format is:
Polygon
0 0
0 700680.0 5247849.0 0.0 0.0
1 700676.0 5247846.0 0.0 0.0
2 700603.0 5247885.0 0.0 0.0
3 700609.0 5247891.0 0.0 0.0
4 700680.0 5247849.0 0.0 0.0
END
Open Excel data->Import external data, select Separate next step, select Space, and other next step. Import the Txt file into Excel in columns, then copy the required coordinate point file, right-click and paste selectively in the target Excel, select Transpose, and copy a column of coordinate points into a row of coordinate points to use as a paper document. (You can use the format in Excel to brush the tabulation)
Thirty-three, Arcgis mapping
All layer files to be exported are added to the project, Arcgis -> View -> Layout View -> Change Layout -> Select a layout under General. The layout can be edited directly.
34. The small class number, forest class number and land type are marked on the map in fractional form.
Right-click on the layer -> Properties -> Label -> Expression, "[Lin class number] & "--" & [small class number] &chr(13) & "--------" &chr(13) & [land type]”
35. Insert commonly used tools on layers
Arcgis -> Insert -> Chart column, north arrow, scale bar, text scale bar; the inserted object can display your coordinate points on the layer in text, word, excel or other forms; insert a chart frame and set the chart The projected coordinate system of the frame, add the layer to be displayed locally, and display the layer globally in the form of a mini map locally.
36. Establish grid
1. Right-click in the layer window and click "Data Frame Properties";
2. Select the “Grids” tab and click “New Grid”;
3. Select the Grid type to be created to create a grid of longitude and latitude lines or a grid of coordinate units, and click "Next";
4. Set the line type, style size, etc., and click "Next";
5. Set fonts, etc., and click "Next";
6. Set properties, etc., and click "Finish" to complete the creation of the grid.
Note: The generated Grid can only be seen in layout view.
37. Arcgis -> File -> Export Map, export the electronic version of the map that has been completed and is ready for printing. (Mapping can be divided into satellite imagery and topographic maps. Just add satellite imagery or topographic maps to Arcgis)
38. Copy the coordinate points from the "Sheet1" table to the "Poplar" table according to the tree species classification, and assign ID numbers to the small classes according to the area plots, Excel VBA code. In Tools->Macro->Edit Code
Sub Macro4()
Dim i As Integer
Dim x, z, n As Integer
x = 4
z = 2
n = 1
For i = 1 To 400
If Worksheets("Sheet1").Cells(x, 6).Value = " 杨树 " Then
Worksheets(" 杨树 ").Cells(z, 2).Value = Worksheets("Sheet1").Cells(x, 9).Value
Worksheets(" 杨树 ").Cells(z, 3).Value = Worksheets("Sheet1").Cells(x, 14).Value
Worksheets("poplar").Cells(z, 1).Value = n
z = z + 1
Worksheets(" 杨树 ").Cells(z, 2).Value = Worksheets("Sheet1").Cells(x, 10).Value
Worksheets(" 杨树 ").Cells(z, 3).Value = Worksheets("Sheet1").Cells(x, 15).Value
Worksheets("poplar").Cells(z, 1).Value = n
z = z + 1
Worksheets(" 杨树 ").Cells(z, 2).Value = Worksheets("Sheet1").Cells(x, 11).Value
Worksheets(" 杨树 ").Cells(z, 3).Value = Worksheets("Sheet1").Cells(x, 16).Value
Worksheets("poplar").Cells(z, 1).Value = n
z = z + 1
Worksheets(" 杨树 ").Cells(z, 2).Value = Worksheets("Sheet1").Cells(x, 12).Value
Worksheets(" 杨树 ").Cells(z, 3).Value = Worksheets("Sheet1").Cells(x, 17).Value
Worksheets("poplar").Cells(z, 1).Value = n
z = z + 1
x = x + 1
Else
x = x + 1
End If
If (Worksheets("Sheet1").Cells(x, 4).Value > 0) Then n = n + 1
Next i
End Sub
39. Delete rows with empty cell values. Note that when deleting a row, the cell below will move up by default, and the row number is not lost.
Sub Macro0()
Dim i, x As Integer
x = 2
For i = 1 To 2 000
If (Worksheets(" 杨树 ").Cells(x, 2).Value = "") Then
Worksheets("poplar").Rows(x).Select
Worksheets("poplar").Rows(x).Delete
Else
x = x + 1
End If
Next i
End Sub
40. Generate grid
Data management->feature class->create fishnet in arctoolbox can generate the required grid
41. Village boundaries are generated from small classes. All small classes within a village boundary are integrated to form a village boundary. All villages (linbans) are integrated to form township boundaries. All township boundaries are integrated to form banner-county boundaries.
42. The coordinate point is the location value relative to the local central meridian, which is within the range of 6 degrees or 3 degrees. Longitude and latitude are absolute, and one longitude and latitude corresponds to only one location in the world. When switching between the two, in the map units in Arcgis > View > Data Frame Properties > Standard tab, meters are coordinate point units, and degrees, minutes and seconds are units of latitude and longitude.
43. Longitude and latitude map above
Use MapSource to export a sample (txt file with longitude and latitude), open it in excel, replace the sample with the target longitude and latitude, and save it. Then use GPSBabel conversion software to convert the txt file to mps file, open it with MapSource, set the parameters, and export the coordinate point txt file. Directly use the Arcgis direct mapping method mentioned above.
Forty-four, coordinate point navigation
Use MapSource to export a sample (coordinate point txt file), open it in excel, replace the sample with the target coordinate point, and save it. Then use GPSBabel conversion software to convert the txt file to mps file, open it with MapSource, set parameters, select data transmission, and output to gps.
45. Select the graphic points in MapSource, copy them, and then paste them in excel. Get some target coordinate points.
46. ARCGIS copies the data to be copied from the source layer, and then copies it to the target layer; note that when the amount of data is not large, you can replace layer merging, and delete the data at the same location in the target layer before proceeding. copy.
47. Random function: Rnd*(B-A+1)+A.
48. Hectare area: [small class area]/10000
49. Small class numbering: Static i
i=i+1
i
50. Mu area: [small class area]/10000 *15.
51. If a double line appears, delete the small class and use tracking to automatically complete a circle.
52. When Arcgis establishes a projected coordinate system, Xian_1980_GK_CM_117E and Xian_1980_GK_Zone_21N are unsigned projected coordinate systems; Xian_1980_GK_Zone_20 is a signed coordinate system.
53. Convert latitude and longitude to coordinate point
1. Copy the latitude and longitude points recorded by the GPS into Excel with two columns of latitude and longitude (separate each sub-class with a blank line); then save the Excel as a .CSV file.
(Note: Dots cannot be added before latitude and longitude in CSV files)
2. Open the GPSBabel software "Input Format" and select the data source format as Comma separated values. In the "Output Format" select the conversion target data file format as Garmin Mapsouce-gdb; select the input and output paths in FileName.
3. Use Mapsouce to open the converted GDB file, and select User Defined in Mapsouce->Edit->preferences->Position->Grid and Datum. Grid's Properties set the local central meridian; Datum sets the local dx, dy, dz and df parameters.
Then save as text file.
4. In Excel->Data->Import external data->Import data, pay attention to select the space as the delimiter. (Note: Finally, copy the coordinate point number before the longitude and latitude in Excel)
54. Tools -> Add XY data You can build an attribute table in Excel. The first column in the table marks the small class serial number. Reorder the numbers for each small class. Add two columns after the coordinate points as follows: (If the first column Instead of starting with 0, let each cell in the first column subtract 1)
| 0 |
1 |
606116 |
5478287 |
1. #QNAN |
1. #QNAN |
| 1 |
2 |
606437 |
5478321 |
1. #QNAN |
1. #QNAN |
| 2 |
3 |
606561 |
5478280 |
1. #QNAN |
1. #QNAN |
| 3 |
4 |
606602 |
5478173 |
1. #QNAN |
1. #QNAN |
| 4 |
5 |
606595 |
5478120 |
1. #QNAN |
1. #QNAN |
| 5 |
6 |
606545 |
5478178 |
1. #QNAN |
1. #QNAN |
| 6 |
7 |
606324 |
5478239 |
1. #QNAN |
1. #QNAN |
| 7 |
8 |
606184 |
5478205 |
1. #QNAN |
1. #QNAN |
| 0 |
1 |
609398 |
5477446 |
1. #QNAN |
1. #QNAN |
| 1 |
2 |
609579 |
5477360 |
1. #QNAN |
1. #QNAN |
| 2 |
3 |
609735 |
5477141 |
1. #QNAN |
1. #QNAN |
| 3 |
4 |
609689 |
5477016 |
1. #QNAN |
1. #QNAN |
| 4 |
5 |
609679 |
5477010 |
1. #QNAN |
1. #QNAN |
| 5 |
6 |
609492 |
5477294 |
1. #QNAN |
1. #QNAN |
| 6 |
7 |
609360 |
5477306 |
1. #QNAN |
1. #QNAN |
The light blue part of the upper color part is the intermediate process and can be deleted after subtracting 1. Finally, export the TXT file, replace all the extra spaces, add Polygon and END and copy the first column of each plot to the last column to close the subclasses. Then use the coordinate points to form an area layer. The above two colors are two small classes. (The above method can also be used for point layers).
Fifty-five, M 50F 034042_Ziyu-3 Satellite_2_101_20130604.tif
50-30=20 degree band, 34 vertically aligned, 42 horizontally aligned, 20130604 date.
56. A Use line layers to split area layers in RCGIS
Use layer A to split layer B. The steps are as follows:
1. Open the Editor editing toolbar and click Start Editing to start editing.
2. Call up the topology menu.
3. Select all line layers
4. Click the tool construct features on the topology toolbar.
5. In the pop-up dialog box, select the third "split existing features in target layer using selection" (split existing features in target layer using selection). After clicking OK, the surface layer will be automatically split according to the line edges. Complete the operation.
57. Use 21-degree zone to include the 20-degree zone part, cut the 20-degree zone surface, and the 20-degree zone layer can include the 21-degree zone part.
58. If you use the previous issue or other reference data and the data is in the standard library, you only need to add a new Chinese field in the standard library and copy it between the fields in the database.
59. If you copy data between the second type drop-down database and Arcgis, you need to use VF to replace the relevant fields in the database of the two layers. The FID cannot be a public field in the VF, and you need to copy the FID to a Fields of the same data type are used as temporary public fields. This temporary field will be deleted after the public fields are completed.
close all
CLEAR
SET TALK off
SET MENUS OFF
SET STATUS off
SET SAFETY off
SET SCOREBOARD off
sele 1
use I:-23.dbf
inde on small class number to a
sele 2
use I:-23 Hohnuoer Town second-class noodles.dbf
set relation to small class number into a
repl original small class number with a-> original small class number for small class number=a-> small class number
sele dist abc from aaa into table bbb
60. If the second category software does not have drop-down, you can back up the database alone, add the data dictionary to the shp file without drop-down, and then copy the database back. In this way, the data dictionary update and drop-down are implemented without causing data loss.
61. Batch deletion of attribute library fields
arctoolbox-data management tools-fields-delete field
62. Connection between graphics and libraries
Analysis Tools->Overlay->Spatial Connection can realize the connection of two graphics and library files when the VF public field values are different.