A: This is generally due to the white pixel points at the edge of the raster dataset before the Mosaic, and they participated in raster calculation during the Mosaic, which lead to these white points in the resulting dataset. In this case, it is suggested that you clip the original raster dataset. When clipping, please check the "display effective clipping", and then the clipped raster dataset is Mosaic.
04 Jul,2019 iDesktopA: May be you set the layer visible scale when making the map. You need to clear the visible scale range of the layer.
04 Jul,2019 iDesktopA: In Analysis-Raster Analysis- Algebraic Operation, you can use the function Con. For example, Con([datasource alias.dataset name] > 100 , 1, -9999) , the result grid is part that the value is greater than 100 in the original grid data.
04 Jul,2019 iDesktopA: case 1: when you drag a rectangle, you can see the selected text, which is because the drawing area in CAD has a black background and the text is usually set to white. After the data is imported, the text style remains the same, while the map's background is white by default, and the white text is not visible naturally. You can modify the map background color to see the text in the map. Select the text object, and right click. Then modify the text color through the "similar text style" function. Case 2: when you drag a rectangle, there is no text. But there are records when browsing text dataset property. Because the text object is too small and filtered out. You can set the layer filter object display size to 0 (the default is 4), which make all the objects in layer display. Another way is to convert text dataset into the point dataset, and then make label thematic map to point dataset. The advantage of using the label thematic map can be convenient to set the label text style and set up the scale.
04 Jul,2019 iDesktopA: You need to check the "support text expression" in the [Advanced] tab of the thematic map, and then use the upper and lower subscript expressions to have the corresponding display effect.
04 Jul,2019 iDesktopA: Because when the model is created by 3DMAX, the model coordinates do not start from the origin of 3DMAX, as long as the model coordinates are changed to the origin coordinates.
04 Jul,2019 iDesktopA: As thematic map expression is still essentially the table, field name corresponding to the SQLServer dataset. If the names of the table and the corresponding datasets are different, that's what happens. Now you just need to set the field expression.
04 Jul,2019 iDesktopA: 1. Set the layer filter display condition, and control the object display through the SQL statement. 2. Separate the data to different datasets, that is, use multiple datasets to store the original data. Set the maximum and minimum visible scale after added the point datasets to the map window according to the circumstance, so to control the display of the different scale objects.
04 Jul,2019 iDesktopA: When importing CAD, it is normal for the data volume to increase several times. Because the data storage is different. AutoCAD inside is parameterized storage. For example, for a circle, AutoCAD contains the center point and radius, while SuperMap will generate many points on the circle.
04 Jul,2019 iDesktopA: You can use the [Import Dataset] function. In the importing interface, you check the “first line as the field”. Click the import button, and the field name of the resulting property dataset is from the first line of data in the CSV file.
04 Jul,2019 iDesktopA: There are three points should be noted for the dataset and the result dataset calculated by the cutting and filling: 1. It requires that the two input raster datasets have the same coordinate and projection system to ensure the same coordinates at the same location. If the coordinate system is not consistent, it is likely to produce wrong results. In theory, the spatial range of the two raster datasets is also consistent 2. For two raster datasets whose spatial range is not consistent, only the surface cutting and filling results of the overlapping areas are calculated. 3. If the pixel value of a raster dataset involved in the calculation is blank, the pixel value of the resulting dataset is also blank.
04 Jul,2019 iDesktopA: For the sake of data security, the desktop does not provide a way to modify the field type. It is recommended to update the source field to the target field using the method of field operation.
04 Jul,2019 iDesktopA: The full map attribute is set in the default attribute of the map. When you overlay cloud service map, you need to cancel the full map attribute. The specific operation is as follows: [map attribute] -- [scope] -- [full map]. Find the corresponding property check box to cancel the default check in the map to cancel the full map display.
04 Jul,2019 iDesktopA: In the dropdown of [Object Operation]——[Break Lines], the second action button is [precise interruption], which can be interrupted by percentage or number of segments. It can realize equidistance segmentation by entering the determined number of segments.
04 Jul,2019 iDesktopA: Right-click on the 3D layer: open the shadow, and then set the sun effect to see how the shadow changes.
04 Jul,2019 iDesktopA:(1)In the "topological error handling options", it is necessary to select segment intersection, which is the basis of subsequent topology processing. (2)Topology processing for topology errors will change in the source dataset. If you want to keep the source dataset, you need to backup dataset before the topology processing. Or you can select "create the middle operating dataset", and the next topology processing operations will be in the middle dataset. And that is also for backup of source dataset. It is recommended that select the check box; (3) Segment intersection operation is to get a real node, and sometimes it gets a fake node by merging the adjacent nodes operation. So you might continue to merge the fake nodes after merging the adjacent node operation.
04 Jul,2019 iDesktopA: Modify the advanced properties of the statistics thematic map to display the maximum and minimum display values for size limits. Before the modification, these two values are relatively small and it needs to be set a little larger. The specific values should be more beautiful than the statistical icon in the figure.
04 Jul,2019 iDesktopA: In the empty space of the menu bar, right click to display the "Map Settings" toolbar, or click "View-Toolbar - Map Settings". Modify the measurement unit through the map settings toolbar.
04 Jul,2019 iDesktopA: Because the map information in the database workspace is stored in a binary form in the smData table, it doesn’t support SQL query. If necessary, you can save the current workspace as sxwu, and then open sxwu as a notepad to view the corresponding layer properties on the map.
04 Jul,2019 iDesktopA: The steps are as follows: (1)Right click the datasource, and right click the "import dataset" menu. The data importing dialog box pops up. Click "add file", and select jpg or tif file. (2) In the data import dialog box, select a line from the file list, and click the "advanced" button in the lower right corner. And the "advanced parameter setting" dialog box will pop up. (3) Set the image coordinate reference file in the "Advanced" parameter Settings dialog box, supporting img, tfw, dom, and smc four kinds of format. Examples and descriptions of these four formats can be referred to "Online Help | Technical Topic | Import and Export Dataset | Image Coordinate Reference File". Other reference document does not be identified.
04 Jul,2019 iDesktop