Click the ‘Search’ button to execute the search.In the empty value field in the 3rd Query Row enter the search term ‘weather’.From the Field drop down in the 3rd Query Row select ‘Description’.Click the ‘Add Row’ button to add a 3rd Query Row.In the empty value field in the 2nd Query Row enter the search term ‘flood’.From the Field drop down in the 2nd Query Row select ‘Description’.In the empty value field in the 1st Query Row enter the search term ‘Rain’.
![digital terrain model مدل digital terrain model مدل](https://geodetics.com/wp-content/uploads/2019/10/DEM-generated-from-the-ground-points-of-dataset-2-meter-contour-lines-are-fitted-to-DEM-in-this-example.png)
From the Field drop down in the 1st Query Row select ‘Title’.Two Query Rows should be displayed by default. Open the Advanced Search popout and ensure you are on the ‘Search Terms’ tab.Ensure you are starting with a fresh search by clearing any previous searches.Here we will step through constructing an advanced query where we would like to find all the records which contain ‘Rain’ in the title, and ‘flood’ and ‘weather’ in the description. Changing the Boolean value between two Query Rows will change the value between all Query Rows.
![digital terrain model مدل digital terrain model مدل](https://amumapping.ir/uploads/ecff75409d2f4506bce65e8fcb64598a.w_1096,h_590,r_k.jpg)
The operators are applied at the search level, meaning all Query Rows are separated by the same Boolean value. The Query Constructor supports the use of the Boolean operators ‘AND’ & ‘OR’ between Query Rows. Note: Wildcard characters can be applied to single search terms, but not to search phrases.
![digital terrain model مدل digital terrain model مدل](https://gisland.org/wp-content/uploads/2019/12/zanjan.jpg)
Reviewing your Advanced SearchĪs you build/refine your search in the Advanced Search popout, you can review the entire search and the number of results which will be returned by selecting the ‘Review’ tab. Each time you switch tabs the available filter options and record counts are updated to reflect any changes on the previous tab. (Subjects) the options & record counts displayed are based on your query. Where there are multiple options for a filter category e.g. Note that there is no defined order to the tabs in the Advanced Search and you can apply the filters in any order you choose. From within the Advanced Search you can construct boolean searches and apply one or more filter categories to your search. The Advanced Search popout allows you to build/refine complex queries all in a single tabbed popout.
![digital terrain model مدل digital terrain model مدل](https://static.cdn.asset.aparat.com/avt/24874274-6684-b__1761.jpg)
They may be made from ground surveyed or photogrammetrically obtained heights, existing topographic maps usually originally obtained from analogue photogrammetry, or using radar or laser altimetry data from aircraft or satellites.A Digital Elevation Model (DEM or DTM) with a 25 metre grid covering the Burrum River, Mary River, Noosa River, Maroochy River, Pine River, Brisbane River, Logan-Albert River, Fraser Island, Stradbroke Islands and South Coast catchments.&rft.creator=Anonymous&rft.date=1970&rft.coverage=northlimit=-24.691 southlimit=-28.406 westlimit=151.52 eastLimit=153.591 projection=WGS84 &rft.coverage=25 metre grid covering the Burrum River, Mary River, Noosa River, Maroochy River, Pine River, Brisbane River, Logan-Albert Rivers, Fraser Island, Stradbroke Islands and South Coast catchments&rft_rights=Creative Commons Attribution 3.0 localised data&rft_subject=Environmental&rft_subject=Freshwater&rft_subject=Estuarine&rft_subject=Marine&rft_subject=Terrestrial&rft_subject=Water Column&rft_subject=Riverbank&rft_subject=Digital Elevation Model&rft_subject=Digital Terrain Model&rft_subject=DEM&rft_subject=DTM&rft_subject=Topography&rft_subject=Logan-Albert River&rft.type=dataset&rft.language=English Access the data DEMs are built from datasets of varying type, scale and accuracy. Ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=&rft.title=Digital elevation model - 25metre - South East Queensland - data package&rft.publisher=Griffith University&rft.description=DEMs are sometimes referred to as digital terrain models (DTM), a general term applied to models of elevation, slope, aspect or other terrain attributes.