How can the layers of a GIS be manipulated??? THANKS SO MUCH FOR YOUR HELP!! :)
What do you mean by GIS?
Geographical Information Systems
Check this answer.
http://answers.yahoo.com/question/index?qid=20081015175949AAOVSD5
Also check the instructions with your software.
THANKS SO MUCH AGAIN!!!! :)
In addition to the points mentioned in the reference, a good GIS system can also manipulate the meta-data of each layer, storing them in a database, and thus be searchable.
For example, a user could potentially provide the coordinates of a polygon and query the number of households within the polygon, or the total tax revenue, etc.
To manipulate the layers of a GIS (Geographic Information System), you can follow these steps:
1. Open the GIS software: Start by opening your GIS software, such as ArcGIS, QGIS, or Google Earth.
2. Add data layers: Import the data layers that you want to work with. This could include shapefiles, raster images, GPS coordinates, or other types of spatial data.
3. Organize the layers: Once the data layers are added, you can organize them in the layer panel or table of contents, usually located on the left or right side of the GIS software. You can change the order of the layers by dragging and dropping, rename them, group them, or change their visibility.
4. Adjust layer symbology: You can change the appearance of each layer by modifying its symbology. This includes changing colors, line thickness, opacity, and other visual properties. The symbology options are usually available in the layer properties or symbology menu.
5. Perform layer analysis: GIS software allows you to perform various analytical operations on individual layers or combinations of layers. This includes spatial queries, buffering, overlay analysis, and more. These tools can be found in the analysis menu or toolbar, and their availability depends on the software you are using.
6. Customize layer labels: You can add labels to the features in your layers to enhance map readability. This can be done by accessing the labeling options in the layer properties and choosing the desired labeling format, such as attribute-based labels or custom expressions.
7. Change layer display order: By changing the display order of layers, you can control which layers appear on top of others in the map. For example, if you have a layer showing roads, you can place it above a layer showing buildings to make sure the roads are visible.
8. Set layer transparency: Adjusting the transparency of a layer allows you to see the underlying layers. This can be helpful when you want to compare different layers or when you want to create a map with multiple layers visible simultaneously.
9. Save and export: Once you have manipulated the layers as desired, you can save your GIS project for future use. Additionally, you can export or print your map output as an image, PDF, or another format supported by the GIS software.
Remember, the specific steps and terminology may vary depending on the GIS software you are using.