1.4 Query and search - LUPMISManual

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1. GIS handling

1.4 Query and Search

Level of expertise required for this Chapter: Intermediate; general Map Maker training

Often you are more interested in the data behind a feature, for example the quantitative data of a table describing each unit of a map (census data of an administrative map). This functions only if you have attribute data attached to your graphical data. See  Chapter 4 for details.

Click on Data-tool of the toolbar left, and then on any feature, you are interested in (and which is ‘hit-able’).



You will see the display of many characteristics:


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How to find data?

There are various tools in Map Maker to search for a specific feature:

A) Using the Gazetteer:

1. You define the gazetteer with
right-mouse > Project manager > Navigation > Gazetteers > Add gazetteer > Select folder and file > Open > OK



You can have multiple gazetteers from different files, but it is always the display label, which is gazetteered.

2. You search through
Main menu > Navigate > by Gazetteer > Navigation window: Gazetteer (1, see below) > If you have multiple gazetteers, select > Select the unit you search for (2) > OK (3)

If the listing is very long, you can use the Find tool: In the Navigation window under Find, enter the name of search. Wild card * can be applied, for example:
Bak will find all entries starting with Bak: Bakanta, Bakrom, Bakua, Bakunchirako.
*Bak* will find all entries, which contain ‘bak’.




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B) Go to object id:

If you know the object id and search for, the fastest way is through
Main menu > Navigate > Go to Object ID > Go to Object ID window: Enter id > OK

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C) As file operation:

Main menu > Utilities > Vector utilities > Actions > Select folder and file > Open > Transform window: Spatial queries > Find objects > OK > Search by criteria window: Select from the long listing under ‘Terms’ right: Double-click (1, see below) > Enter criteria statement left (2) > You can define more than one criteria, also include additional file(s) in your search (Add file) > OK (3)


Search will then start. If nothing found, a Failed find window will appear.

> Specify new file name > Save. You can then add (display) this new layer, which contains only the items found under this search.

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D) In live layer mode:

The map has first to be transferred to live layer (
right-mouse > Project manager > select (or add) layer > Copy layer to live layer > OK).

In live layer: Main menu > Edit > Show selection manager > Selection Manager window: Find tab > Select the criteria from the list, for example ‘Find objects by criteria’ > Find > Search by criteria window: Select from the long listing under ‘Terms’ right > Enter criteria statement left > You can define more than one criteria, also include additional file(s) in your search (Add file) > OK. (This is the same process as described above under B).


Search will then start. If nothing found, a Failed find window will appear. Otherwise, the selected unit(s) will show in red.

From here, you can edit or delete this feature.

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E) Using the Guide map feature:

If you know roughly the area, an easy way to ‘navigate’ to this area is
Main menu > Navigate > by Guide Map > Navigation window: Select scale (or zoom in or out with + or -) > Click on the area of interest > OK



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F) By coordinates:

If you know the coordinates, you can navigate to that location by
Main menu > Navigate > Go to coordinate > Navigate window: Go to XY > Enter x and y coordinates > OK

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G) Street names or housenumbers:

The processes for searching a street name or housenumber are explained in  Chapter xxxxxxxxxxx, based on geocoding database and standardized street naming.

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LUPMIS exercise: Add layer Ghana_regions_popdata, link it with the database of the same name, and display socio-economic data of each region.

  


 
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