I have GIS points (x, y data) for every minute over a landscape. If I load them up as a CSV into QGIS they all show up as points, which you would expect. However, what I would like to do is use these points to create a grid. In other words, each point is a corner of a 1x1 minute grid. How can I do this?
121701
I'm a beginner QGIS user and am struggling with creating a grid. I've used the MMQGIS geometry import function to import data from the CSV file shown below but they pop up as points on QGIS. I want to make it into a grid so that I can pretty much have each of the points be in a box format. I've also tried to use the join function but am not sure what variable both the grid and the points have so that I can join them.
88471
I'm pretty new to using QGIS and I'm curious about how to import and export GPS points created in QGIS. I have QGIS 2.0.1 Dufour on Windows XP and a Garmin 62s. Any suggested walk throughs would be great.
41338
I am digitising line-features based on WGS-84 point-coordinates from a PDF which cannot be copied from.  The final line layer should contain lines which each connect two points and have the following attributes:   Name of start point - name of end point value in [ft] value in [m] remark (same for all features) date of creation   Currently I have a csv-based point layer which simply contains the name and coordinates of each point.    Creating the point layer is no problem, but creating the lines is a bit of a hassle. Either I manually create a .csv containing all existing connections between points like the following table and run connect by lines:    Or I digitise the lines manually but fill in the values (except for the value in [ft]) automatically.    Personally I would prefer option 2, since option 1 involves more manual work and the process has to be repeated regularly (and I figure I could transfer the solution to other tasks), but I can't get the expression right which should fill in the name of the line. All other values are created flawlessly (though they are not taken from another layer based on geometry).  I added the WKT of each point to the point-layer. Currently I am running the following, which returns NULL, despite it seems to be correct to me:  attribute(get_feature('point-layer','geom',geom_to_wkt(start_point($geometry))),'Waypoint')||' - '||attribute(get_feature('point-layer','geom',geom_to_wkt(end_point($geometry))),'Waypoint')   Any ideas where I went wrong?
110032
I have a csv file that is 133mb in size and has over 1.3 million lines of data.  Each line of data has its own lat/long and I was wondering what would be the best way to display those points based off the lat/longs in ArcGIS Desktop 10 and ultimately turn it into a point shapefile?  So far I have tried the "Make XY Event Layer" tool but that keeps failing...  ERROR 000212: Cannot create XY event source Failed to execute (MakeXYEventLayer).  The csv file is properly formatted and the lat/long fields are numeric so I have no idea why it keeps crashing.  Here is what the first 2 lines of my CSV look like, the first line is what should be the header:  "LAT","LONG","CUSTOMER_MASTER_ID","STORE_NBR","TRANSACTION_DT","SKU_DIVISION_ID","SKU_DEPARTMENT_ID","SKU_CLASS_ID","SKU_CATEGORY_ID","SKU_NBR","SALES_AMT" "32.363544","-110.969778","2000000792627","2940","8/11/2010","2060","3920","5120","84021","5127866","13.99"   Any ideas?
97504
I am trying to get the coordinates of each node of a polygon in QGIS. What I basically did is use the following tools:  Vector -> Geometry tools -> Extract nodes  Vector -> Geometry tools -> Export Geometry column  However only around the first 300 points had successfully obtained coordinate values in the new xcoord and ycoord fields. The other three thousand plus points had null values. What can I do to get the other points' coordinates? Also is there an easy way to get the point order of each node?
121882
Do you know of a way to take surveyor's calls from an excel file (for example: N35-45-15W 60.0 ft, etc) and have them generate polygon shapefiles point by point in GIS? I know you can easily do this with point features that have coordinates, but I am trying to figure out how to build full polygons (without XY coordinate information, just surveyor's calls).
113395
I have a set of points, which are spread over a wide geographical area.  I need to be able to create a set of polygons which best represent the clustered points.  In parts, some points may simply lie on their own, but in the main they are grouped, but not linked.  I have effectively created a grid of, lets say, the north western hemisphere and in each grid, have created a point with an arbitrary value.  For all values of zero, I have deleted the points, leaving the points with non zero values in them.  I now need to turn these points into polygons and am struggling a little...  Using ArcGIS and python, I thought about clustering the points, then 'convex hulling' them, but am struggling through not really knowing ArcGIS that well; how do I cluster?  thanks in advance for any help.
29951
I am new to Python and I am using the Python console in QGIS 3.10 to make the coordinate grid on a vector layer. I had lots of vector files which are basically square shaped of 500 meters but all are of different location. I want to export this vector file but after making grid on top of that. I want to do it in Python as I can loop it and do all the process at once. My workflows goes like this:  Load vector layer Open map canvas Display vector layer in map canvas Make coordinate grid on top of that Export that as image  The sample image of what i want is like this: Initial Vector layer:  After making Grids on that  Here is my code and in output it is nit creating the grids ` fn = r&quot;C:\Users\Asus\OneDrive\Documents\map secien\360m\parent grid\grid_no_A1.shp&quot; layer = iface.addVectorLayer(fn, 'grid_no_A1', 'ogr')  from qgis.PyQt import QtGui layers = QgsProject.instance().mapLayersByName('grid_no_A1') layer = layers[0]  project = QgsProject.instance() manager = project.layoutManager() layoutName = 'Layout1' layouts_list = manager.printLayouts()  # remove any duplicate layouts for layout in layouts_list:     if layout.name() == layoutName:         manager.removeLayout(layout)  layout = QgsPrintLayout(project) layout.initializeDefaults() layout.setName(layoutName)         manager.addLayout(layout)  # create map item in the layout map = QgsLayoutItemMap(layout) map.setRect(20, 20, 20, 20)  # set the map extent ms = QgsMapSettings() ms.setLayers([layer])  # set layers to be mapped rect = QgsRectangle(ms.fullExtent()) rect.scale(1.0) ms.setExtent(rect) map.setExtent(rect) map.setBackgroundColor(QColor(255, 255, 255, 0)) layout.addLayoutItem(map) map.attemptMove(QgsLayoutPoint(5, 20, QgsUnitTypes.LayoutMillimeters)) map.attemptResize(QgsLayoutSize(180, 180, QgsUnitTypes.LayoutMillimeters))   grid = QgsLayoutItemMapGrid(layout) out = QgsLayoutItemMap(layout) grid = QgsLayoutItemMapGrid(&quot;hr&quot;, out) grid.annotationEnabled() grid.setIntervalX(0.1) grid.setIntervalY(0.1) grid.setAnnotationEnabled(True)  layout.addLayoutItem(out) layout = manager.layoutByName(layoutName) exporter = QgsLayoutExporter(layout) fn = r'C:\Users\Asus\OneDrive\Documents\map secien\layout_export.jpeg' exporter.exportToImage(fn, QgsLayoutExporter.ImageExportSettings())
116632
This might be a very simple thing, but I just can't figure it out how to do it in QGIS (alternatively I'm also grateful for explanations for ArcGIS). I have a fisheries dataset with multiple catches in one location. I'd like to display these catches as a dot varying in size according to the number of catches - like dots displaying population size in a city. However, the excel sheet I have is one catch each row, with the same coordinates but different attributes (length, weight, etc). Is there a tool in QGIS that can merge all points in one location (other attributes not needed then)? Thanks a lot for your help!
53593
I have a CSV file where one line looks like this:  Duration, user, lat-start, long-start, lat-end, long-end 298, Casual,38.9101,-77.0444,38.91554,-77.03818   Each row in the CSV has two points and I need to draw a line between those two points for each row.   How can I do this using QGIS 1.8.0?   I have tried using the delimited text file plug-in, but it just draws points and has no line option from what I can see.
21319
I am a relative beginner to using GIS, and am running QGIS 2.0.1 in Linux. I have two historical maps which I want to analyze, that show land use patterns in the same area at two different moments in time. I have them scanned and geo-referenced as layers in one file. Side by side, they look like this:     The main thing I am interested in is to compare the extent of the light and dark green areas between the two maps. Is this possible, and if so, what is the simplest approach? Is there a way to do this based on raster analysis? And if I have to make a shapefile, what is the best way to do that?  What I have already considered:   Drawing shapefiles as polygons by hand, as described in . That would be VERY tedious. Creating simplified, high contrast raster images by using color selection, filters etc. by trial and error in the Gimp and converting that to a shapefile. The results were very sloppy.
43437
I have two shapefiles....   points containing a number field 'response_time' a polygon grid of square polygons containing fields including 'PNTCNT' with the number of points per polygon, calculated already using the tool 'points in polygon'   There are between 0 and 600 points within the bounds of each polygon in the grid.  I want to add fields to the polygon grid for the mean, min and max response times within each polygon, in addition to the PNTCNT field already there.  I have tried the 'Join attributes by location' tool, making the polygon layer the target and the points the join layer, and vice versa. I've selected 'take summary of interesting features'.  But I can't get the result I want. All I end up with is the polygon grid again but with an extra field 'COUNT' which replicates (or duplicates) the 'PNTCNT' field. No min, max and mean of values from the points layer.  What am I doing wrong? Is there a better way to do this? I have tried this using QGIS 1.7 and 1.8.
8968
How do I create point features with exact (manually entered) coordinates in QGIS? I get precise GPS coordinates from a survey team which I need to add to a point layer. What I want: add point, type in the coordinates and when pressing enter the point is created where it is supposed to be.
32832
I have a raster and a vector point file. I need to generate another raster of same resolution showing how many points are inside the corresponding pixels of the original raster.  Something like that:   Is there a way of doing that in QGIS?   I just want the number of points, no attributes involved.
122088
I created a grid of rectangular polygons with the Create Grid function, from the Vector Creation group of the Processing Toolbox in QGIS 3.4.2. The rectangles measure half a degree of longitude by half a degree of latitude.    When I want to label the polygons, I write an expression that rounds the values of latitude and longitude attributes to 2 decimal places, since the attributes created in the grid brings many decimal places.    But the round function rounds the values badly.    I know that I can create new attributes that express the coordinates with fewer decimal places and label the entities based on those attributes, but I was struck by the behavior of the function. I expected it to round to the nearest value.    Does anyone know what the problem is that the round function wrongly rounds off the decimal number?    Attached screenshots of Source Fields and the Attribute Table.
12416
I'm very new to the GIS world, so my problem could be very stupid, but I'm going to try anyway.  Objective  Given a list of coordinates in longitude/latitude, stored as a .csv file, I want to create a buffer with distance of x km around those coordinates. (In case this is relevant, these coordinates are locations of the societies in the . These societies scatter all around the world.)  Problem  I'm only able to create buffers with distance in radial degrees, but I want to do them in (kilo)meters. I'm aware of the following Q&amp;A's, but following what's suggested therein doesn't seem to solve my problem:          What I have tried...   I start QGIS (v2.4), and Add delimited text layer  choose my .csv file and the x/y fields, click OK select WGS 84 as my CRS (also tried NAD83 but didn't make a difference), click OK right-click on layer and select Save As..., in the dialog box, choose the following and click OK:  add sccs_meter.shp as layer to the current project Select Vector > Geoprocessing Tools > Buffers > set buffer distance as 10   The result is a buffer with radius of approximately 1068km, which suggests that buffer distance is 10 degrees rather than 10 meters.  What did I do wrong here?
39146
I learned on ArcGIS, and I'm familiarizing myself with the use of QGIS.  So far I love it, but the process of re-projecting and transforming datums seems less intuitive than in Arc.    I recently geocoded 63 locations, pulled in the csv and transformed into a points shapefile. I then set the projection for that points layer as the same for my block groups multi-polygon (EPSG 102121- NAD_1983_Michigan_GeoRef_Feet_US).    The 2 layers are still misaligned, even if I save each layer with the specified projection and try to reopen in a blank project.  Can anyone help?