SuperGIS Desktop Ensures You a Smoother Experience of Diversity Data Operation in SuperSurv
In Taiwan, many cadastral data are used as reference data when surveyors are doing their surveys. These cadastral data are usually digitized with 4 elements. First, the surveyors add some point features to mark the location of landmarks, such as street lights, fire hydrants or mailboxes. Then, they use polyline features to delineate other objects with linear shapes, such as roads, lands or rivers. Also, they create polygon features to record the location of buildings, parks or lakes. Finally, in order to recognize them easily, the surveyors still need to enter some text as labels of these features when digitizing them. In Fig.1, we can see the polylines on the map that are border lines separating different land parcels. And different numbers are labeled near the polylines to identify each of them.
Fig.1 Cadastral data in SuperGIS Desktop
The limitation of device
Nowadays, the technology has advanced rapidly as time passes. People can achieve lots of work with the help of it. For example, now, almost everyone has his or her own mobile device, therefore we can operate SuperSurv on our mobile devices and conduct surveys with preloaded cadastral data. However, every android device still has its tolerance. When users are loading huge cadastral data or high-resolution satellite images, the android device may not be able to work as smoothly or even crash. If we still want to use big data when surveying, what can we do to overcome these limitations?
Cache generator and data convertor in SuperGIS Desktop
To save system crashes problem, we can change a high resolution image into map caches, which enable GIS users to enjoy the high performance map browsing experience without any quality or detail loss ( Fig.2).
And Cache Generator is the tool that helps users to flexibly create map caches according to their needs. With Cache Generator, users can define map scales, extents, and even visible scales of each layer to create customized, high-quality maps in STP (SuperGIS Tile Package) format (Fig.3).
Fig.2. Map cache in SuperGIS Desktop
Fig.3. Cache generator in SuperGIS Desktop
Now we’ve solved the problem of loading high-resolution images, the next one to fix is the big cadastral data. There is a very useful application called “Data Convertor”, in SuperGIS Desktop (Fig.4). It can help users convert their data into different formats. If the original cadastral data are in .dxf or .dgn format, you can convert them into .geo or .shp format by Data Convertor. Then, load the newly generated map tiles and the layer data again to SuperSurv and get ready to finish your fieldwork with ease!
Fig.4. Data Convertor in SuperGIS Desktop
Conclusion and result
After finishing the data preparation work above, now we can open SuperSurv, create a blank project, and load our map tiles and converted layer data to the project folder. Then, go to the layer setting page and switch the label setting on in text layer (Fig.5).
Fig.5. Label setting in SuperSurv
Next, add the map tiles as basemap. Users can easily find the field to select the file path and import the map tiles (Fig.6).
Fig.6. Set basemap in SuperSurv
When finish all settings, you can go back to the main screen and see the results with better operation experience. Users can decide which layer they want to show on the screen— the basemap, line layer or text layer. What’s more, the line layer and text layer are both editable in SuperSurv.
Fig.7. Result in SuperSurv
Operating huge data in mobile device is no longer a difficult task. If users can make good use of Data Convertor and Catch Generator in SuperGIS Desktop, within just few steps, they can regenerate any kind of data according to their needs and use them in field surveys. Nowadays, though we can obtain data easily from many online resources, however, data with different sources or pre-processing methods may render our systems unstable. What’s even worse, sometimes the layers can’t overlay with one another accurately. Therefore, just follow the procedure in Fig.8., and then enjoy the smooth operation experience and conduct your field survey more efficiently.