From d659241a1b8115f1994595fba49f248afb10fcfa Mon Sep 17 00:00:00 2001 From: enauj Date: Mon, 2 Dec 2024 20:48:08 +0000 Subject: [PATCH] deploy: 6687c568523aaac3181ebc421bfe0005d235f1df --- .../content/Modul_3/en_qgis_digitalisation.md | 11 ++++--- .../content/Modul_4/en_qgis_map_design_2.md | 12 ++++---- .../content/Modul_5/en_qgis_modul_5_ex3.md | 8 ++--- content/Modul_3/en_qgis_digitalisation.html | 26 +++++++--------- content/Modul_4/en_qgis_map_design_2.html | 30 ++++++++++--------- content/Modul_5/en_qgis_modul_5_ex3.html | 8 ++--- searchindex.js | 2 +- 7 files changed, 47 insertions(+), 50 deletions(-) diff --git a/_sources/content/Modul_3/en_qgis_digitalisation.md b/_sources/content/Modul_3/en_qgis_digitalisation.md index 3980e660..fd356c5d 100644 --- a/_sources/content/Modul_3/en_qgis_digitalisation.md +++ b/_sources/content/Modul_3/en_qgis_digitalisation.md @@ -23,11 +23,10 @@ The concept of digitisation within GIS. Source: HeiGIT ## Digitising in QGIS -In QGIS, digitization is the process of creating digital vector layers from scanned maps or aerial images. It -involves tracing features such as points, lines, or polygons directly on the map canvas to represent geographic -elements like buildings, roads, or land parcels. Additionally, you can assign attributes to each feature during -digitization, enabling further analysis and integration with other geospatial data. This digitized data becomes -a valuable asset for spatial analysis and mapping. +In QGIS,digitisation involves tracing features such as points, lines, or polygons directly on the map canvas to +represent geographic elements like buildings, roads, or land parcels. Additionally, you can assign attributes to each +feature during digitization, enabling further analysis and integration with other geospatial data. This digitized data +becomes a valuable asset for spatial analysis and mapping. :::{admonition} Digitisation in humanitarian work :class: tip @@ -119,6 +118,7 @@ Digitizing Toolbar in QGIS 3.36 ::: +For more complex digitisation procedures, you will use the advanced digitisation toolbar. However, for this chapter, we will focus on the normal digitisatin toolbar. :::{dropdown} Advanced digitizing Toolbar @@ -492,7 +492,6 @@ width: 750 px Building Damage Assessment in Paikgachha Upazila, Khulna District, Khulna Division, Bangladesh as of 4 June 2024 (Source: [Int'l Charter, UNOSAT](https://reliefweb.int/map/bangladesh/building-damage-assessment-paikgachha-upazila-khulna-district-khulna-division-bangladesh-4-june-2024-imagery-analysis-4-june-2024-published-7-june-2024-v1)) ``` -::: ## Spatial Digitisation Errors in QGIS diff --git a/_sources/content/Modul_4/en_qgis_map_design_2.md b/_sources/content/Modul_4/en_qgis_map_design_2.md index 01b77bbd..e07b40b7 100644 --- a/_sources/content/Modul_4/en_qgis_map_design_2.md +++ b/_sources/content/Modul_4/en_qgis_map_design_2.md @@ -464,9 +464,7 @@ Add a the extent of the main map to your overview map (the red rectangle in the This method requires you to be sure that you are not going to modify the overview map, as once the layers are locked, they will keep the style, and any updates will not affect the overview map. ``` -## Map Composition - - +---- ## Exporting the print layout @@ -549,16 +547,18 @@ width: 500 px Atlas Toolbar ``` +```{note} If you can't see the Atlas Tools, you must first activate the Atlas Toolbar under `View` > `Toolbars` > `Atlas Toolbar`. +``` -## Generating an Atlas +### Generating an Atlas An atlas will generate a new page with the same map layout for each feature in a layer. For most purposes, it useful to first create a map layout with the elements such as legend, sources and overview map and then insert the map item that will be controlled by the Atlas. To generate an atlas: 1. Click on the ![](../../fig/30.30.2_print_layout_atlas_settings.png) `Atlas Settings`-button in the Atlas Toolbar. 2. In the new window, activate the `Generate an Atlas` option. -3. Select the `Coverage Layer`. This will determine the features or polygons that will be displayed on a page. In our example, we will use the subnational administrative districts in Nigeria (`ADM1`). -4. Select the `Page Name`. This should be the name of the subnational district or location that is displayed on that page. To display the name of the district, we will choose `ADM1_REF`. +3. Select the `Coverage Layer`. This will determine the features or polygons that will be displayed on a page. In our example, we will use the subnational administrative regions in Nigeria (`ADM1`). +4. Select the `Page Name`. This should be the name of the subnational region or location that is displayed on that page. To display the name of the region, we will choose the column `ADM1_REF`, which holds the names of the regions in english. 5. Now let's add a map to the empty print layout. 6. Click on the map and navigate to the __Layer Properties__ window on the right. 7. Scroll down until you see the option `Controlled by Atlas` and activate it. diff --git a/_sources/content/Modul_5/en_qgis_modul_5_ex3.md b/_sources/content/Modul_5/en_qgis_modul_5_ex3.md index 1ca7381c..30220a8c 100644 --- a/_sources/content/Modul_5/en_qgis_modul_5_ex3.md +++ b/_sources/content/Modul_5/en_qgis_modul_5_ex3.md @@ -111,11 +111,11 @@ In case the information states an exact area, create a new polygon layer and map | Number| Description | | :-------------------- | :----------------- | -|1 | A bomb threat including Improvised Explosive Devices (IED) on the road N45 right between Seri-Bahlol and Tableeghi Markaz Mardina near Jandy has been reported by local radio stations. Please mark the area between the communities along the road as no-go areas. | -|2 | In a conversation with a PRCS driver, a local teacher shared that the vicinity of the Government Girls Primary School in Takkar is notorious for being a minefield. Specifically, the fields between the school and the Noormuhmmad hospital are known to be heavily mined. Due to this danger, local farmers are extremely reluctant to work on this particular piece of land.| +|1 | A __bomb threat__ including Improvised Explosive Devices (IED) on the road N45 right between __Seri-Bahlol__ and Tableeghi Markaz Mardina near Jandy has been reported by local radio stations. Please mark the area between the communities along the road as no-go areas. | +|2 | In a conversation with a PRCS driver, a local teacher shared that the vicinity of the __Government Girls Primary School in Takkar__ is notorious for being a minefield. Specifically, the fields between the school and the __Noormuhmmad hospital__ are known to be heavily mined. Due to this danger, local farmers are extremely reluctant to work on this particular piece of land.| |3 |Following the recent events, it has been decided that the vicinity surrounding the __Arbab Niaz Cricket Stadium Peshawar__ is now designated as a no-go area for all staff members. This area encompasses the region bordered by the __N5__ road to the south, the __Afghan Colony road__ to the north and east, and the __Charsadda Road__ to the west.| -|4 |GPS Coordinates __(33.99519949518549, 71.66217873936723)__: A humanitarian worker was transporting medical supplies through the region when they were approached by a local farmer. The farmer mentioned that a nearby abandoned well, located at these coordinates, has become a gathering point for unexploded ordnance. Due to its proximity to a residential area, this site is now flagged as high-risk and needs immediate attention from demining teams.| -|5 | Address: (34.02878398623702, 71.43081737211224) : A health unit here has recently been vacated after a bomb threat was called in. Police and bomb squads searched the premises but didn’t find any explosives. However, local business owners reported unusual activity around the building in the weeks leading up to the threat. This location is now under surveillance. The area between the health unit and the river, as well as the parks and playground behind it, need to be marked as a temporary no-go zone. | +|4 | GPS Coordinates: __(33.99519949518549, 71.66217873936723)__. A humanitarian worker was transporting medical supplies through the region when they were approached by a local farmer. The farmer mentioned that a nearby abandoned well, located at these coordinates, has become a gathering point for __unexploded ordnance__. Due to its proximity to a residential area, this site is now flagged as high-risk and needs immediate attention from demining teams.| +|5 | GPS Coordinagtes: __(34.02878398623702, 71.43081737211224)__. A health unit here has recently been vacated after a bomb threat was called in. Police and bomb squads searched the premises but didn’t find any explosives. However, local business owners reported unusual activity around the building in the weeks leading up to the threat. This location is now under surveillance. The area between the health unit and the river, as well as the parks and playground behind it, need to be marked as a temporary no-go zone. | |6 | __Qissa Khwani Bazaar, Peshawar__: A popular historical market at this address has become a focal point for local community gatherings, but recent intelligence reports suggest that the site could be at risk for political protests that have turned violent in the past. Authorities are now considering setting up temporary barriers to manage the flow of people, and it's crucial that this location is marked as a high-risk area for potential crowd control measures.| The current SOP states that the sides of recent violent incidents are to be avoided in a 1 km radius. To reflect this on the map, we will use the buffer tool. diff --git a/content/Modul_3/en_qgis_digitalisation.html b/content/Modul_3/en_qgis_digitalisation.html index 1557f006..0232fa29 100644 --- a/content/Modul_3/en_qgis_digitalisation.html +++ b/content/Modul_3/en_qgis_digitalisation.html @@ -562,7 +562,6 @@

Contents

  • Editing the attribute values
    • -
  • Spatial Digitisation Errors in QGIS
    • @@ -589,11 +588,10 @@

    Digitisation

    Digitising in QGIS#

    -

    In QGIS, digitization is the process of creating digital vector layers from scanned maps or aerial images. It -involves tracing features such as points, lines, or polygons directly on the map canvas to represent geographic -elements like buildings, roads, or land parcels. Additionally, you can assign attributes to each feature during -digitization, enabling further analysis and integration with other geospatial data. This digitized data becomes -a valuable asset for spatial analysis and mapping.

    +

    In QGIS,digitisation involves tracing features such as points, lines, or polygons directly on the map canvas to +represent geographic elements like buildings, roads, or land parcels. Additionally, you can assign attributes to each +feature during digitization, enabling further analysis and integration with other geospatial data. This digitized data +becomes a valuable asset for spatial analysis and mapping.

    Digitisation in humanitarian work

    If you want to know how community mapping and digitisation can help improve the resilience of communities and facilitate humanitarian work, take a look at Paul Knight’s blogpost “This is the first time this community is on a map…” — Digital Community Mapping in Nigeria

    @@ -722,7 +720,8 @@

    Digitisation toolbars

    -
    +

    For more complex digitisation procedures, you will use the advanced digitisation toolbar. However, for this chapter, we will focus on the normal digitisatin toolbar.

    +
    Advanced digitizing Toolbar
    @@ -1131,13 +1130,8 @@

    Editing the attribute valuesFig. 56 Building Damage Assessment in Paikgachha Upazila, Khulna District, Khulna Division, Bangladesh as of 4 June 2024 (Source: Int’l Charter, UNOSAT)#

    - - - - -
    -

    Spatial Digitisation Errors in QGIS#

    -

    The accuracy of geodata is crucial for spatial analysis. Positional errors are inevitable when data are manually +

    Spatial Digitisation Errors in QGIS

    +

    The accuracy of geodata is crucial for spatial analysis. Positional errors are inevitable when data are manually digitised. The most common examples include undershooting and overshooting. When your coordinates do not connect as they should, and overshooting, when the lines go past where they should. Often these errors are not visible unless you zoom in quite a bit on the coordinates. Setting a fuzzy tolerance (snapping tolerance) is @@ -1149,6 +1143,9 @@

    Spatial Digitisation Errors in QGISFig. 57 Digitising Errors in QGIS. Source: SpatialPost.#

    + + +

    @@ -1230,7 +1227,6 @@

    Spatial Digitisation Errors in QGISEditing the attribute values -
  • Spatial Digitisation Errors in QGIS
    • diff --git a/content/Modul_4/en_qgis_map_design_2.html b/content/Modul_4/en_qgis_map_design_2.html index 766b6528..6631f9d8 100644 --- a/content/Modul_4/en_qgis_map_design_2.html +++ b/content/Modul_4/en_qgis_map_design_2.html @@ -570,11 +570,12 @@

    Contents

  • Adding an overview map
    • -
  • Map Composition
  • Exporting the print layout
  • Map Templates
    • -
  • The Atlas function (automatic map generation)
    • -
  • Generating an Atlas
    • +
  • The Atlas function (automatic map generation) +
    • @@ -1046,10 +1047,7 @@

    Adding an overview map -
    -

    Map Composition#

    - -
    +

    Exporting the print layout#

    Once you are finished with the map composition, it is time to export export the print layout as a PDF or SVG file.

    @@ -1125,16 +1123,18 @@

    The Atlas function (automatic map generation)Fig. 134 Atlas Toolbar#

    +
    +

    Note

    If you can’t see the Atlas Tools, you must first activate the Atlas Toolbar under View > Toolbars > Atlas Toolbar.

    -

    +
    -

    Generating an Atlas#

    +

    Generating an Atlas#

    An atlas will generate a new page with the same map layout for each feature in a layer. For most purposes, it useful to first create a map layout with the elements such as legend, sources and overview map and then insert the map item that will be controlled by the Atlas. To generate an atlas:

    1. Click on the Atlas Settings-button in the Atlas Toolbar.

    2. In the new window, activate the Generate an Atlas option.

      3. -

    3. Select the Coverage Layer. This will determine the features or polygons that will be displayed on a page. In our example, we will use the subnational administrative districts in Nigeria (ADM1).

      4. -

    4. Select the Page Name. This should be the name of the subnational district or location that is displayed on that page. To display the name of the district, we will choose ADM1_REF.

      5. +

    5. Select the Coverage Layer. This will determine the features or polygons that will be displayed on a page. In our example, we will use the subnational administrative regions in Nigeria (ADM1).

      6. +

    6. Select the Page Name. This should be the name of the subnational region or location that is displayed on that page. To display the name of the region, we will choose the column ADM1_REF, which holds the names of the regions in english.

    7. Now let’s add a map to the empty print layout.

    8. Click on the map and navigate to the Layer Properties window on the right.

    9. Scroll down until you see the option Controlled by Atlas and activate it.

      10. @@ -1157,6 +1157,7 @@

      Generating an Atlas

    +