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  • Q: Can I perform group query with the SQL query in SuperMap software?

    A: At present, only the attribute query of SuperMap software supports group query, and the spatial query does not support group query currently. The query statement for attribute query is the same as the standard sql query statement. For example, if you want to query the lowest scores of all the subjects among all students, you can use the statement as follows: SELECT table.name, table.subject, min (table.score) as minScore FROM table GROUP by table.name.

    09 July,2019 iDesktop
  • Q: After installing oracle, I can connect to the server with PL/SQL. Why are the commands for creating and opening oracle datasources gray in iDesktop?

    A: Firstly, check if the system PATH contains the Oracle installation path. If not, manually add it to the PATH system variable. Secondly, check whether Oracle is 32 bit if iDesktop is 32 bit. If iDekstop is 64 bit, Oracle must also be 64 bit.

    09 July,2019
  • Q: Can I generate the corresponding image or grid data for the oblique photogrammetry data in iDesktop?

    A: Yes, you can achieve this purpose with the 8c version of iDesktop. You can generate the corresponding image or grid data in a planar scene with oblique photogrammetry data with the command on the 3D Analysis tab.

    09 July,2019 iDesktop
  • Q: Can I perform image composite with iDesktop?

    A: This feature is available from the 801 version on the Data tab. The image composite operation is based on the additive color composite principle. Image composite assigns the three primary colors of red, green and blue to the three bands of the remote sensing image to get a colored image. Image composite with different bands will get resulting images highlighting different types of feature.

    09 July,2019 iDesktop
  • Q: How can I migrate the oracle datasource on the server to other machines?

    A: 1. Use PL/SQL tool or command to export all the tables under the oracle datasource to dmp files. 2. Create the user and tablespace for the oracle datasource on the target machine. 3. Import the dmp files on the target machine. Note: The import of dmp files cannot be performed in the sqlplus window. The import should be executed on the CMD terminal.

    09 July,2019 iDesktop
  • Q: How can I enhance the rendering performance of the raster data?

    A: 1. Create image pyramids for the raster data. 2. Enable the block drawing parameter for the raster data in the supermap.xml file in the bin folder of the installation directory of iDesktop. 

    09 July,2019 iDesktop
  • Q: What are types of datasets that support the operations of appending rows? What are the requirements for appending rows for the datasets?

    A: Currently point, line, polygon, text, CAD, and tabular datasets support the operation of appending rows. Network and rout datasets do not support the operation of appending rows now. It requires that the name and type of the appending field for the source dataset should be identical to those of the appended field for the target dataset. 

    09 July,2019 iDesktop
  • Q: What should I do to enhance the precision of registration for the CAD dataset considering only two pairs of control points can be selected for CAD data registration?

    A: Currently, the CAD data only supports the Rectangular and Offset registration methods, which require two pairs of control points. To employ more control points to enhance the precision, you need to covert the CAD dataset into single datasets first, and then use batch registration to perform registration with more control points.

    09 July,2019 iDesktop
  • Q: I need to display a white globe to overlay my own image data for translucent display.Can I hide the global image on the 3D globe in the scene?

    A: You cannot hide 3D globe directly. You can create a new dataset, draw a global region, convert the vector to a single-valued raster data, add the converted raster data to the 3D scene, and set the color table of the raster data layer to white. Then add your own image data to the top layer of the scene set it translucent.

    09 July,2019 iDesktop
  • Q: Why cannot I find the scales when I open the Mapping for Scales window again after I imported scales and close the Mapping for Scales window in SuperMap iDesktop 8C?

    A: Scales will be reserved in the Mapping for Scales window if you check Fixed Scales and import the required series of scales in the Map Properties window.

    09 July,2019 iDesktop
  • Q: While creating oracle datasource using SuperMap iDesktop, an error occurred and I got the error message that system table already exists. I also failed to open he datasource directly. How can I solve this issue?

    A: 1. delete the tables and sequences begin with sm under the current user; 2. run the statement ALTER SYSTEM CHECK DATAFILES; 3. re-create the datasource. The three steps above can solve the problem.

    09 July,2019 iDesktop
  • Q: When I opened the data of oblique photogrammetry data using SuperMap iDesktop, I found that the data is very blurred with triangular faces. How can I solve this issue?

    A: You can adjust the LOD scaling ratio in the page of the layer properties. The smaller the LOD value, the finer the display of the model data.

    09 July,2019 iDesktop
  • Q: How can I modify the picture and text on the splash screen during extension development with iDesktop?

    A: There are two ways to modify the picture and text on the splash screen during extension development. (1) Directly set GlobalParameter.SplashFilePath; (2) Replace the Logo_Desktop.gif picture in the bin folder of the installation directory. Please make sure that the new picture should have the same name and format as the original one.

    09 July,2019 iDesktop
  • Q: Why did I fail to perform the visibility analysis for two points of a network dataset with iDesktop 8C?

    A: Please set the tolerance value to 0 while constructing the network dataset.

    09 July,2019 iDesktop
  • Q: How can I export the attributes of a region dataset into an Excel file?

    A: You can open the attribute table of the dataset, select the rows and columns you want to export, right click and choose to export the selected rows and columns into an excel table.

    09 July,2019 iDesktop
  • Q: How can I calculate points with distance less than 100 meters in a point dataset?

    A: Display the Measure Distance dialog box by clicking Proximity Analysis—Calculate Distance on the Spatial Analysis tab, set source data and neighboring data to the point data, and set the maximum distance to 100 to generate an attribute table. Each record in the attribute table stores the IDs and distance of a pair of points satisfying the condition.

    09 July,2019 iDesktop
  • Q: How can I modify the color of the plot objects?

    A: The plot objects are stored in the CAD dataset and the styles of the plot objects are stored in the dataset itself. To modify the style of a plot object, select the object, click to display the Properties panel, modify the style including the line color, the background color, etc.

    09 July,2019 iDesktop
  • Q: How can I change the format of longitude and latitude coordinates of the mouse from DMS to Degrees on the status bar?

    A: There is a “Loop” icon in front of the latitude and longitude information. You can switch back and forth between the two formats by clicking the icon directly.

    09 July,2019 iDesktop
  • Q: What are the requirements for official license lending, and how to achieve it?

    A: There are two conditions for license lending: (1) Network file license; (2) Available user number for lending. The specific operation is as follows: click the Borrow button in the Borrow and Lend module of the license center, and follow the borrowing process to generate the borrowing file *.id of the computer, copy the file to the lending server and generate the lending certificate *h2r following the lending process. Finally, copy the generated lending certificate to the local machine and act…

    09 July,2019 iDesktop
  • Q: How can I transform a planar coordinate system with no projection into latitude and longitude coordinate system?

    A: The planar coordinate system with no projection can be converted into a latitude and longitude coordinate system by the means of registration. There are two methods for registration: (1) If there is already a reference layer, open the registration tool, set the registration layer and reference layer, and then puncture the same place in the registration layer and the reference layer, select the appropriate registration method, and perform registration. (2) If you already know the latitude and …

    09 July,2019 iDesktop
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