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QGIS 3.0 - Creating a dot map with multiple categories
How to create polygons from a polyline graticule?QGIS 2.4 Processing (Zonal Statistics) errorImporting CSV file with csvt data in QGIS (2.8) will not assign type “date” to fieldsQGIS select by location failingArea of Intersection between two polygon files in QGISDisplaying multiple categories on a QGIS map?Error Heatmap plugin QGIS 3.2.0Grass algorithm r.neighbors doesn't work in Qgis 3.4. How can I solve this?Using gdal_proximity in QGIS modeler?QGIS 3 - Variables in rule-based rendering?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I'd like to create something almost identical to this:
I'd like to display what languages are most spoken within each neightbourhood. My data has 6 languages. Is this possible for a novice like myself? I've put together some maps with 1 category of data (eg. population, income, etc), but never with 6 categories.
My data table looks like this:
Is there a relatively easy way to do this? Is my data organized properly to do so? Is there a better way to represent this data? I've tried using the Random Points Inside Polygons but I can't get it to work.
Here's my error message:
Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis/./python/pluginsprocessingalgsqgisRandomPointsPolygons.py", line 165, in processAlgorithm
pointCount = int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
Execution failed after 0.10 seconds
My data does not have lat & long for each point.
qgis mapping
asked May 20 at 14:50
JonJon
112
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
|
show 3 more comments
I'd like to create something almost identical to this:
I'd like to display what languages are most spoken within each neightbourhood. My data has 6 languages. Is this possible for a novice like myself? I've put together some maps with 1 category of data (eg. population, income, etc), but never with 6 categories.
My data table looks like this:
Is there a relatively easy way to do this? Is my data organized properly to do so? Is there a better way to represent this data? I've tried using the Random Points Inside Polygons but I can't get it to work.
Here's my error message:
Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis/./python/pluginsprocessingalgsqgisRandomPointsPolygons.py", line 165, in processAlgorithm
pointCount = int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
Execution failed after 0.10 seconds
My data does not have lat & long for each point.
qgis mapping
asked May 20 at 14:50
JonJon
112
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If you have point-data, simply useclassifiedsymbology based on the language column.
– Erik
May 20 at 14:56
Hi, Jon! Welcome to the GIS SE! Please make sure that you take the tour to get familiar with the Q&A model we follow here. A good question gives enough detail that other users shouldn't need clarification. Additionally, you should provide as much detail as possible about what you've already attempted in solving this issue yourself. For instance: when you ran random points inside polygons, what wasn't working about it? Did you simply get an output that wasn't suitable, or did it not give you anything?
– JoshC
May 20 at 15:00
Hi Josh. I was unable to produce anything. I get this error message: imgur.com/a/TGbaWb6
– Jon
May 20 at 15:05
Is your tabular data joined to a polygon layer? What does the polygon layer attribute table look like in QGIS?
– JoshC
May 20 at 15:23
Here's an image of both. I got rid of nulls in my data table like you instructed, but it looks like it's still reading them as null when it's connected to my shape file. imgur.com/a/muKCifz. To clarify, I made sure there were no nulls in my data set.
– Jon
May 20 at 15:57
|
show 3 more comments
I'd like to create something almost identical to this:
I'd like to display what languages are most spoken within each neightbourhood. My data has 6 languages. Is this possible for a novice like myself? I've put together some maps with 1 category of data (eg. population, income, etc), but never with 6 categories.
My data table looks like this:
Is there a relatively easy way to do this? Is my data organized properly to do so? Is there a better way to represent this data? I've tried using the Random Points Inside Polygons but I can't get it to work.
Here's my error message:
Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis/./python/pluginsprocessingalgsqgisRandomPointsPolygons.py", line 165, in processAlgorithm
pointCount = int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
Execution failed after 0.10 seconds
My data does not have lat & long for each point.
qgis mapping
asked May 20 at 14:50
JonJon
112
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'd like to create something almost identical to this:
I'd like to display what languages are most spoken within each neightbourhood. My data has 6 languages. Is this possible for a novice like myself? I've put together some maps with 1 category of data (eg. population, income, etc), but never with 6 categories.
My data table looks like this:
Is there a relatively easy way to do this? Is my data organized properly to do so? Is there a better way to represent this data? I've tried using the Random Points Inside Polygons but I can't get it to work.
Here's my error message:
Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis/./python/pluginsprocessingalgsqgisRandomPointsPolygons.py", line 165, in processAlgorithm
pointCount = int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
Execution failed after 0.10 seconds
My data does not have lat & long for each point.
qgis mapping
qgis mapping
asked May 20 at 14:50
JonJon
112
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked May 20 at 14:50
JonJon
112
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited May 22 at 4:29
Jon
asked May 20 at 14:50
JonJon
112
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked May 20 at 14:50
JonJon
112
asked May 20 at 14:50
JonJon
112
112
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Jon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If you have point-data, simply useclassifiedsymbology based on the language column.
– Erik
May 20 at 14:56
Hi, Jon! Welcome to the GIS SE! Please make sure that you take the tour to get familiar with the Q&A model we follow here. A good question gives enough detail that other users shouldn't need clarification. Additionally, you should provide as much detail as possible about what you've already attempted in solving this issue yourself. For instance: when you ran random points inside polygons, what wasn't working about it? Did you simply get an output that wasn't suitable, or did it not give you anything?
– JoshC
May 20 at 15:00
Hi Josh. I was unable to produce anything. I get this error message: imgur.com/a/TGbaWb6
– Jon
May 20 at 15:05
Is your tabular data joined to a polygon layer? What does the polygon layer attribute table look like in QGIS?
– JoshC
May 20 at 15:23
Here's an image of both. I got rid of nulls in my data table like you instructed, but it looks like it's still reading them as null when it's connected to my shape file. imgur.com/a/muKCifz. To clarify, I made sure there were no nulls in my data set.
– Jon
May 20 at 15:57
|
show 3 more comments
If you have point-data, simply useclassifiedsymbology based on the language column.
– Erik
May 20 at 14:56
Hi, Jon! Welcome to the GIS SE! Please make sure that you take the tour to get familiar with the Q&A model we follow here. A good question gives enough detail that other users shouldn't need clarification. Additionally, you should provide as much detail as possible about what you've already attempted in solving this issue yourself. For instance: when you ran random points inside polygons, what wasn't working about it? Did you simply get an output that wasn't suitable, or did it not give you anything?
– JoshC
May 20 at 15:00
Hi Josh. I was unable to produce anything. I get this error message: imgur.com/a/TGbaWb6
– Jon
May 20 at 15:05
Is your tabular data joined to a polygon layer? What does the polygon layer attribute table look like in QGIS?
– JoshC
May 20 at 15:23
Here's an image of both. I got rid of nulls in my data table like you instructed, but it looks like it's still reading them as null when it's connected to my shape file. imgur.com/a/muKCifz. To clarify, I made sure there were no nulls in my data set.
– Jon
May 20 at 15:57
If you have point-data, simply use
classified symbology based on the language column.– Erik
May 20 at 14:56
If you have point-data, simply use
classified symbology based on the language column.– Erik
May 20 at 14:56
Hi, Jon! Welcome to the GIS SE! Please make sure that you take the tour to get familiar with the Q&A model we follow here. A good question gives enough detail that other users shouldn't need clarification. Additionally, you should provide as much detail as possible about what you've already attempted in solving this issue yourself. For instance: when you ran random points inside polygons, what wasn't working about it? Did you simply get an output that wasn't suitable, or did it not give you anything?
– JoshC
May 20 at 15:00
Hi, Jon! Welcome to the GIS SE! Please make sure that you take the tour to get familiar with the Q&A model we follow here. A good question gives enough detail that other users shouldn't need clarification. Additionally, you should provide as much detail as possible about what you've already attempted in solving this issue yourself. For instance: when you ran random points inside polygons, what wasn't working about it? Did you simply get an output that wasn't suitable, or did it not give you anything?
– JoshC
May 20 at 15:00
Hi Josh. I was unable to produce anything. I get this error message: imgur.com/a/TGbaWb6
– Jon
May 20 at 15:05
Hi Josh. I was unable to produce anything. I get this error message: imgur.com/a/TGbaWb6
– Jon
May 20 at 15:05
Is your tabular data joined to a polygon layer? What does the polygon layer attribute table look like in QGIS?
– JoshC
May 20 at 15:23
Is your tabular data joined to a polygon layer? What does the polygon layer attribute table look like in QGIS?
– JoshC
May 20 at 15:23
Here's an image of both. I got rid of nulls in my data table like you instructed, but it looks like it's still reading them as null when it's connected to my shape file. imgur.com/a/muKCifz. To clarify, I made sure there were no nulls in my data set.
– Jon
May 20 at 15:57
Here's an image of both. I got rid of nulls in my data table like you instructed, but it looks like it's still reading them as null when it's connected to my shape file. imgur.com/a/muKCifz. To clarify, I made sure there were no nulls in my data set.
– Jon
May 20 at 15:57
|
show 3 more comments
3 Answers
3
active
oldest
votes
From the content of the error message, it would appear that you're trying to run the algorithm on a field which contains null values, so that's the main problem.
Open up the Field Calculator and check the box to Update existing field and select the the field you're creating your points from, which I'm assuming is the "total" field in your data.
Enter the following expression:
if( "number" IS NULL, 0, "number")
This will insert 0's in place of all the nulls, which will allow you to run the Random Points tool now.
answered May 20 at 15:22
JoshCJoshC
2,2711423
I've done this, but I still get the same error message. I wonder if my data is not setup to run a dot map? I don't know how to articulate things as well as I should - I'm still relatively new to this.
– Jon
May 20 at 15:26
add a comment |
In Excel, re-arrange the table so that you have only one row for each Geography value. Create a column for each language, and put the number of speakers of that language in that column. Eg, convert this
to this
I did this manually, but I think you can do it automatically using something called a pivot table, as mentioned here and here.
Save the new table as a CSV. Add the new table to your QGIS project.
Join the new table to the neighborhood layer. Now you have a one-to-one relationship between table rows and neighborhood geometries.
Run Random points inside polygons once for each language category. Be sure to name each new layer with the name of the language.
answered May 20 at 19:01
cskcsk
11.4k1236
There must be something wrong with how I'm joining the tables together. I recreated my table like you instructed. I've loaded both the shape file and the .CSV in QGIS. When I go to join, I select the shape file and join them. Then when I open the Attribute Table for my data set, the numbers appear correct. Nothing is Null. But when I run the Random Points tool it gives me the same error.
– Jon
May 20 at 20:20
There are so many different screenshots at the link you posted I'm having a hard time finding the error message. Can you please add the text of the error message to your original question? Use the edit link under the question.
– csk
May 22 at 1:49
The error message is now in the original question.
– Jon
May 22 at 4:31
add a comment |
The input data you have has blank cells as one of the values. QGIS uses the field you specified to add points up to the number in the field. To do this it converts the field into an integer, but it cannot convert a blank cell into an integer.
The easiest way for you to fix this is to put 0's into the blank cells of your source data.
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
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active
oldest
votes
From the content of the error message, it would appear that you're trying to run the algorithm on a field which contains null values, so that's the main problem.
Open up the Field Calculator and check the box to Update existing field and select the the field you're creating your points from, which I'm assuming is the "total" field in your data.
Enter the following expression:
if( "number" IS NULL, 0, "number")
This will insert 0's in place of all the nulls, which will allow you to run the Random Points tool now.
answered May 20 at 15:22
JoshCJoshC
2,2711423
I've done this, but I still get the same error message. I wonder if my data is not setup to run a dot map? I don't know how to articulate things as well as I should - I'm still relatively new to this.
– Jon
May 20 at 15:26
add a comment |
From the content of the error message, it would appear that you're trying to run the algorithm on a field which contains null values, so that's the main problem.
Open up the Field Calculator and check the box to Update existing field and select the the field you're creating your points from, which I'm assuming is the "total" field in your data.
Enter the following expression:
if( "number" IS NULL, 0, "number")
This will insert 0's in place of all the nulls, which will allow you to run the Random Points tool now.
answered May 20 at 15:22
JoshCJoshC
2,2711423
I've done this, but I still get the same error message. I wonder if my data is not setup to run a dot map? I don't know how to articulate things as well as I should - I'm still relatively new to this.
– Jon
May 20 at 15:26
add a comment |
From the content of the error message, it would appear that you're trying to run the algorithm on a field which contains null values, so that's the main problem.
Open up the Field Calculator and check the box to Update existing field and select the the field you're creating your points from, which I'm assuming is the "total" field in your data.
Enter the following expression:
if( "number" IS NULL, 0, "number")
This will insert 0's in place of all the nulls, which will allow you to run the Random Points tool now.
answered May 20 at 15:22
JoshCJoshC
2,2711423
From the content of the error message, it would appear that you're trying to run the algorithm on a field which contains null values, so that's the main problem.
Open up the Field Calculator and check the box to Update existing field and select the the field you're creating your points from, which I'm assuming is the "total" field in your data.
Enter the following expression:
if( "number" IS NULL, 0, "number")
This will insert 0's in place of all the nulls, which will allow you to run the Random Points tool now.
answered May 20 at 15:22
JoshCJoshC
2,2711423
answered May 20 at 15:22
JoshCJoshC
2,2711423
answered May 20 at 15:22
JoshCJoshC
2,2711423
answered May 20 at 15:22
JoshCJoshC
2,2711423
2,2711423
I've done this, but I still get the same error message. I wonder if my data is not setup to run a dot map? I don't know how to articulate things as well as I should - I'm still relatively new to this.
– Jon
May 20 at 15:26
add a comment |
I've done this, but I still get the same error message. I wonder if my data is not setup to run a dot map? I don't know how to articulate things as well as I should - I'm still relatively new to this.
– Jon
May 20 at 15:26
I've done this, but I still get the same error message. I wonder if my data is not setup to run a dot map? I don't know how to articulate things as well as I should - I'm still relatively new to this.
– Jon
May 20 at 15:26
I've done this, but I still get the same error message. I wonder if my data is not setup to run a dot map? I don't know how to articulate things as well as I should - I'm still relatively new to this.
– Jon
May 20 at 15:26
add a comment |
In Excel, re-arrange the table so that you have only one row for each Geography value. Create a column for each language, and put the number of speakers of that language in that column. Eg, convert this
to this
I did this manually, but I think you can do it automatically using something called a pivot table, as mentioned here and here.
Save the new table as a CSV. Add the new table to your QGIS project.
Join the new table to the neighborhood layer. Now you have a one-to-one relationship between table rows and neighborhood geometries.
Run Random points inside polygons once for each language category. Be sure to name each new layer with the name of the language.
answered May 20 at 19:01
cskcsk
11.4k1236
There must be something wrong with how I'm joining the tables together. I recreated my table like you instructed. I've loaded both the shape file and the .CSV in QGIS. When I go to join, I select the shape file and join them. Then when I open the Attribute Table for my data set, the numbers appear correct. Nothing is Null. But when I run the Random Points tool it gives me the same error.
– Jon
May 20 at 20:20
There are so many different screenshots at the link you posted I'm having a hard time finding the error message. Can you please add the text of the error message to your original question? Use the edit link under the question.
– csk
May 22 at 1:49
The error message is now in the original question.
– Jon
May 22 at 4:31
add a comment |
In Excel, re-arrange the table so that you have only one row for each Geography value. Create a column for each language, and put the number of speakers of that language in that column. Eg, convert this
to this
I did this manually, but I think you can do it automatically using something called a pivot table, as mentioned here and here.
Save the new table as a CSV. Add the new table to your QGIS project.
Join the new table to the neighborhood layer. Now you have a one-to-one relationship between table rows and neighborhood geometries.
Run Random points inside polygons once for each language category. Be sure to name each new layer with the name of the language.
answered May 20 at 19:01
cskcsk
11.4k1236
There must be something wrong with how I'm joining the tables together. I recreated my table like you instructed. I've loaded both the shape file and the .CSV in QGIS. When I go to join, I select the shape file and join them. Then when I open the Attribute Table for my data set, the numbers appear correct. Nothing is Null. But when I run the Random Points tool it gives me the same error.
– Jon
May 20 at 20:20
There are so many different screenshots at the link you posted I'm having a hard time finding the error message. Can you please add the text of the error message to your original question? Use the edit link under the question.
– csk
May 22 at 1:49
The error message is now in the original question.
– Jon
May 22 at 4:31
add a comment |
In Excel, re-arrange the table so that you have only one row for each Geography value. Create a column for each language, and put the number of speakers of that language in that column. Eg, convert this
to this
I did this manually, but I think you can do it automatically using something called a pivot table, as mentioned here and here.
Save the new table as a CSV. Add the new table to your QGIS project.
Join the new table to the neighborhood layer. Now you have a one-to-one relationship between table rows and neighborhood geometries.
Run Random points inside polygons once for each language category. Be sure to name each new layer with the name of the language.
answered May 20 at 19:01
cskcsk
11.4k1236
In Excel, re-arrange the table so that you have only one row for each Geography value. Create a column for each language, and put the number of speakers of that language in that column. Eg, convert this
to this
I did this manually, but I think you can do it automatically using something called a pivot table, as mentioned here and here.
Save the new table as a CSV. Add the new table to your QGIS project.
Join the new table to the neighborhood layer. Now you have a one-to-one relationship between table rows and neighborhood geometries.
Run Random points inside polygons once for each language category. Be sure to name each new layer with the name of the language.
answered May 20 at 19:01
cskcsk
11.4k1236
answered May 20 at 19:01
cskcsk
11.4k1236
answered May 20 at 19:01
cskcsk
11.4k1236
answered May 20 at 19:01
cskcsk
11.4k1236
11.4k1236
There must be something wrong with how I'm joining the tables together. I recreated my table like you instructed. I've loaded both the shape file and the .CSV in QGIS. When I go to join, I select the shape file and join them. Then when I open the Attribute Table for my data set, the numbers appear correct. Nothing is Null. But when I run the Random Points tool it gives me the same error.
– Jon
May 20 at 20:20
There are so many different screenshots at the link you posted I'm having a hard time finding the error message. Can you please add the text of the error message to your original question? Use the edit link under the question.
– csk
May 22 at 1:49
The error message is now in the original question.
– Jon
May 22 at 4:31
add a comment |
There must be something wrong with how I'm joining the tables together. I recreated my table like you instructed. I've loaded both the shape file and the .CSV in QGIS. When I go to join, I select the shape file and join them. Then when I open the Attribute Table for my data set, the numbers appear correct. Nothing is Null. But when I run the Random Points tool it gives me the same error.
– Jon
May 20 at 20:20
There are so many different screenshots at the link you posted I'm having a hard time finding the error message. Can you please add the text of the error message to your original question? Use the edit link under the question.
– csk
May 22 at 1:49
The error message is now in the original question.
– Jon
May 22 at 4:31
There must be something wrong with how I'm joining the tables together. I recreated my table like you instructed. I've loaded both the shape file and the .CSV in QGIS. When I go to join, I select the shape file and join them. Then when I open the Attribute Table for my data set, the numbers appear correct. Nothing is Null. But when I run the Random Points tool it gives me the same error.
– Jon
May 20 at 20:20
There must be something wrong with how I'm joining the tables together. I recreated my table like you instructed. I've loaded both the shape file and the .CSV in QGIS. When I go to join, I select the shape file and join them. Then when I open the Attribute Table for my data set, the numbers appear correct. Nothing is Null. But when I run the Random Points tool it gives me the same error.
– Jon
May 20 at 20:20
There are so many different screenshots at the link you posted I'm having a hard time finding the error message. Can you please add the text of the error message to your original question? Use the edit link under the question.
– csk
May 22 at 1:49
There are so many different screenshots at the link you posted I'm having a hard time finding the error message. Can you please add the text of the error message to your original question? Use the edit link under the question.
– csk
May 22 at 1:49
The error message is now in the original question.
– Jon
May 22 at 4:31
The error message is now in the original question.
– Jon
May 22 at 4:31
add a comment |
The input data you have has blank cells as one of the values. QGIS uses the field you specified to add points up to the number in the field. To do this it converts the field into an integer, but it cannot convert a blank cell into an integer.
The easiest way for you to fix this is to put 0's into the blank cells of your source data.
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
add a comment |
The input data you have has blank cells as one of the values. QGIS uses the field you specified to add points up to the number in the field. To do this it converts the field into an integer, but it cannot convert a blank cell into an integer.
The easiest way for you to fix this is to put 0's into the blank cells of your source data.
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
add a comment |
The input data you have has blank cells as one of the values. QGIS uses the field you specified to add points up to the number in the field. To do this it converts the field into an integer, but it cannot convert a blank cell into an integer.
The easiest way for you to fix this is to put 0's into the blank cells of your source data.
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
The input data you have has blank cells as one of the values. QGIS uses the field you specified to add points up to the number in the field. To do this it converts the field into an integer, but it cannot convert a blank cell into an integer.
The easiest way for you to fix this is to put 0's into the blank cells of your source data.
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
answered May 20 at 15:19
HeikkiVesantoHeikkiVesanto
9,4102346
9,4102346
add a comment |
add a comment |
Jon is a new contributor. Be nice, and check out our Code of Conduct.
Jon is a new contributor. Be nice, and check out our Code of Conduct.
Jon is a new contributor. Be nice, and check out our Code of Conduct.
Jon is a new contributor. Be nice, and check out our Code of Conduct.
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If you have point-data, simply use
classifiedsymbology based on the language column.– Erik
May 20 at 14:56
Hi, Jon! Welcome to the GIS SE! Please make sure that you take the tour to get familiar with the Q&A model we follow here. A good question gives enough detail that other users shouldn't need clarification. Additionally, you should provide as much detail as possible about what you've already attempted in solving this issue yourself. For instance: when you ran random points inside polygons, what wasn't working about it? Did you simply get an output that wasn't suitable, or did it not give you anything?
– JoshC
May 20 at 15:00
Hi Josh. I was unable to produce anything. I get this error message: imgur.com/a/TGbaWb6
– Jon
May 20 at 15:05
Is your tabular data joined to a polygon layer? What does the polygon layer attribute table look like in QGIS?
– JoshC
May 20 at 15:23
Here's an image of both. I got rid of nulls in my data table like you instructed, but it looks like it's still reading them as null when it's connected to my shape file. imgur.com/a/muKCifz. To clarify, I made sure there were no nulls in my data set.
– Jon
May 20 at 15:57