I did some research and there are a few options for us. Take a look and think about it. Remember that people can simply do a screen capture to copy/print the PDFs f they want. Alternatively, what I do is right-click “View page source” and find the URL to the PDF/JPG. I then enter that address directly into the browser and download the PDF/JPG. There isn’t much you can do to stop that. The best I’ve seen is for us to put all the PDFs/JPGs into a special directory and add a .htaccess file so if someone tries to directly browse to the JPG/PDF, they get a 403 Forbidden error. We get access to them by using a special servedata.php/?file=xxx script which has back-door access to that special directory.

ID	States Type	Elev	Location
1	OR, CA, NV Land – 2mi	5285, 5293wp?	41.9947, -119.9994
2	OR, ID, NV Land – 1mi	5274, 5277wp?	42.0000, -117.0263
3	ID, NV, UT Land – 3mi	5233, 5230wp?	41.9934, -114.0415
4	NV, UT, AZ Land – 4mi	2703, 2557wp?	37.0000, -114.0500
5	MT, ID, WY Land – 4-10mi	8330, 8347wp?	44.4780, -111.0532
6	ID, UT, WY Land – 0.57mi	7057	42.0016, -111.0468
7	WY, UT, CO Land – 0ft	8408, 8402wp?	41.0005, -109.0500
8	UT, CO, AZ, NM Land – 0ft	4866, 4870wp?	36.9988, -109.0452
9	MT, ND, SD Land – 1.6mi	3048, 3055wp?	45.9449, -104.0454
10	MT, WY, SD Land – 0.5mi	3422, 3428wp?	44.9973, -104.0578
11	WY, SD, NE Land – 1mi	3932	43.0003, -104,0532
12	WY, NE, CO Land – 0ft	5386, 5382wp?	41.0016, -104.0532
13	CO, NE, KS Land – 0ft	3444, 3447wp?	40.0003, -102.0516
14	CO, NM, OK Land – 0ft	4445, 4444wp?	37.0000, -103.0022
15	NM, OK, TX Land – 0ft	4714, 4712wp?	36.5002, -103.0024
16	CO, KS, OK Land – 0ft	3687, 3692wp?	36.9927, -102.0419
17	ND, SD, MN Land – 0ft	970, 972wp?	45.9348, -96.5632
18	SD, MN, IA Land – 0ft	1410, 1413wp?	43.5001, -96.4532
19	KS, OK, MO Land – 0ft	1024, 1016wp?	36.9985, -94.6178
20	OK, MO, AR Land – 0ft	1129, 1049wp?	36.4993, -94.6178
21	TX, AR, LA Land – 40ft	226, 224wp?	33.0191, -94.0429
22	IN, MI, OH Land – 0ft	1066, 1071wp?	41.6960, -84.8060
23	TN, AL, GA Land – 600ft	720, 725wp?	34.9844, -85.6052
24	AL, FL, GA Land – 0.25mi	70, 83wp?	31.0005, -85.0008
25	TN, NC, GA Land – 600ft	1760, 1758wp?	34.9878, -84.1918
26	NC, GA, SC Land – 3.5mi	2149, 2147wp?	35.0005, -83.1083
27	KY, VA, TN Land – 1.1mi	1987, 1988wp?	36.6006, -83.6753
28	TN, VA, NC Land – 1.5mi	4628, 4636wp?	36.5879, -81.6774
29	KY, VA, WV Land – 0.6mi	827, 828wp?	37.5378, -81.9680
30	PA, WV, MD Land – 0.57mi	2320, 2328wp?	39.7210, -79.4768
31	MD, WV, VA Land – 0.25mi	260, 254wp?	39.3211, -77.7190
32.1	VA, DC, MD Land – 175ft?	10, 23wp?	38.9341, -77.1199
32.2	VA, DC, MD Land – 640ft?	8, 0wp?	38.7909, -77.0395
33	PA, MD, DE Land – 800ft	255, 236wp?	39.7219, -75.7886
34	NY, PA, NJ Land – 0ft	420, 409wp?	41.3572, -74.6946
35	MA, NY, CT Land – 1.5mi	2146, 2151wp?	42.0495, -73.4874
36	VT, NY, MA Land – 1mi	1417, 1436wp?	42.7457, -73.2649
37	VT, NH, MA Land – 775ft	197, 181wp?	42.7268, -72.4584
38	CT, MA, RI Land – 0.8mi	630, 625wp?	42.0079, -71.7990
51	WA, OR, ID Water – 300ft	866	tbd
52	CA, NV, AZ Water – 130ft	478	tbd
53	SD, NE, IA Water – 350ft	1101	tbd
54	NE, IA, MO Water – 275ft	907	tbd
55	NE, KS, MO Water – 350ft	853	tbd
56	OK, AR, TX Water – 300ft	292	tbd
57	MN, WI, MI Water – 25mi	600	tbd
58	MN, IA, WI Water – 525ft	621	tbd
59	IA, WI, IL Water – 325ft	604	tbd
60	IA, MO, IL Water – 0.25mi	483	tbd
61	IL, KY, MO Water – 0.25mi	292	tbd
62	MO, KY, TN Water – 0.25mi	263	tbd
63	MO, AR, TN Water – 150ft	240	tbd
64	AR, TN, MS Water – 700ft	189	tbd
65	AR, LA, MS Water – 690ft	80	tbd
66	TN, MS, AL Water – 0.25mi	427	tbd
67	WI, IL, MI Water – 40mi	577	tbd
68	IL, MI, IN Water – 9.5mi	577	tbd
69	IL, IN, KY Water – 750ft	347	tbd
70	IN, OH, KY Water – 700ft	460	tbd
71	OH, KY, WV Water – 100ft	518	tbd
72	OH, WV, PA Water – 75ft	665	tbd
73	PA, DE, NJ Water – 0.5mi	0	tbd
74	CT, RI, NY Water – 1mi	0	tbd
101	AK, YU, BC Canada, Land	-99	location
102	BC, WA, ID Canada, Land	-99	location
103	BC, ID, MT Canada, Land	-99	location
104	BC, ALB, MT Canada, Land	-99	location
105	ALB, SAS, MT Canada, Land	-99	location
106	SAS, MT, ND Canada, Land	-99	location
107	SAS, MAN, ND Canada, Land	-99	location
108	MAN, ND, MN Canada, Water	-99	location
109	MAN, ONT, MN Canada, Water	-99	location
110	ONT, MN, MI Canada, Water	-99	location
111	MI, ONT, OH Canada, Water	-99	location
112	ONT, OH, PA Canada, Water	-99	location
113	ONT, PA, NY Canada, Water	-99	location
114	ONT, QUE, NY Canada, Water	-99	location
115	QUE, NY, VT Canada, Water	-99	location
116	QUE, VT, NH Canada, Water	-99	location
117	QUE, NH, ME Canada, Land	-99	location
118	ME, QUE, NB Canada, Water	elev	location
151	CA, BAJA, AZ Mexico, Water	-99	location
152	BAJA, AZ, SON Mexico, Water	-99	location
153	AZ, NM, SON Mexico, Land	-99	location
154	NM, SON, CHI Mexico, Land	-99	location
155	NM, TX, CHI Mexico, Water	-99	location
156	TX, CHI, COA Mexico, Water	-99	location
157	TX, COA, NL Mexico, Water	-99	location
158	TX, NL, TAM Mexico, Water	-99	location

Tripoints Accessible on Land:

1. Oregon-California-Nevada
2. Oregon-Idaho-Nevada
3. Idaho-Nevada-Utah
4. Nevada-Utah-Arizona
5. Montana-Idaho-Wyoming
6. Idaho-Utah-Wyoming
7. Wyoming-Utah-Colorado
8. Four Corners (Utah-Colorado-Arizona-New Mexico)
9. Montana-North Dakota-South Dakota
10. Montana-Wyoming-South Dakota
11. Wyoming-South Dakota-Nebraska
12. Wyoming-Nebraska-Colorado
13. Colorado-Nebraska-Kansas
14. Colorado-New Mexico-Oklahoma
15. New Mexico-Oklahoma-Texas
16. Colorado-Kansas-Oklahoma
17. North Dakota-South Dakota-Minnesota
18. South Dakota-Minnesota-Iowa
19. Kansas-Oklahoma-Missouri
20. Oklahoma-Missouri-Arkansas
21. Texas-Arkansas-Louisiana
22. Indiana-Michigan-Ohio
23. Tennessee-Alabama-Georgia
24. Alabama-Florida-Georgia
25. Tennessee-North Carolina-Georgia
26. North Carolina-Georgia-South Carolina
27. Kentucky-Virginia-Tennessee
28. Tennessee-Virginia-North Carolina
29. Kentucky-Virginia-West Virginia
30. Pennsylvania-West Virginia-Maryland
31. Maryland-West Virginia-Virginia
32. Virginia-Washington, D.C.-Maryland
33. Pennsylvania-Maryland-Delaware
34. New York-Pennsylvania-New Jersey
35. Massachusetts-New York-Connecticut
36. Vermont-New York-Massachusetts
37. Vermont-New Hampshire-Massachusetts
38. Connecticut-Massachusetts-Rhode Island

Tripoints Located in Water:

51. Washington-Oregon-Idaho
52. California-Nevada-Arizona
53. South Dakota-Nebraska-Iowa
54. Nebraska-Iowa-Missouri
55. Nebraska-Kansas-Missouri
56. Oklahoma-Arkansas-Texas
57. Minnesota-Wisconsin-Michigan
58. Minnesota-Iowa-Wisconsin
59. Iowa-Wisconsin-Illinois
60. Iowa-Missouri-Illinois
61. Illinois-Kentucky-Missouri
62. Missouri-Kentucky-Tennessee
63. Missouri-Arkansas-Tennessee
64. Arkansas-Tennessee-Mississippi
65. Arkansas-Louisiana-Mississippi
66. Tennessee-Mississippi-Alabama
67. Wisconsin-Illinois-Michigan
68. Illinois-Michigan-Indiana
69. Illinois-Indiana-Kentucky
70. Indiana-Ohio-Kentucky
71. Ohio-Kentucky-West Virginia
72. Ohio-West Virginia-Pennsylvania
73. Pennsylvania-Delaware-New Jersey
74. Connecticut-Rhode Island-New York

United States-Canada Tripoints:

101. Alaska-Yukon Territory-British Columbia
102. British Columbia-Washington-Idaho
103. British Columbia-Idaho-Montana
104. British Columbia-Alberta-Montana
105. Alberta-Saskatchewan-Montana
106. Saskatchewan-Montana-North Dakota
107. Saskatchewan-Manitoba-North Dakota
108. Manitoba-North Dakota-Minnesota
109. Manitoba-Ontario-Minnesota
110. Ontario-Minnesota-Michigan
111. Michigan-Ontario-Ohio
112. Ontario-Ohio-Pennsylvania
113. Ontario-Pennsylvania-New York
114. Ontario-Quebec-New York
115. Quebec-New York-Vermont
116. Quebec-Vermont-New Hampshire
117. Quebec-New Hampshire-Maine
118. Maine-Quebec-New Brunswick

United States-Mexico Tripoints:

151. California-Baja California-Arizona
152. Baja California-Arizona-Sonora
153. Arizona-New Mexico-Sonora
154. New Mexico-Sonora-Chihuahua
155. New Mexico-Texas-Chihuahua
156. Texas-Chihuahua-Coahuila
157. Texas-Coahuila-Nuevo Leon
158. Texas-Nuevo Leon-Tamaulipas

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WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW

ID	States Type	Elev	Location	Benchmark Notes
1	OR, CA, NV Land – 2mi	5285, 5293wp?	41.9947, -119.9994	Boundary Post CA NV OR Marked with a cairn
2	OR, ID, NV Land – 1mi	5274, 5277wp?	42.0000, -117.0263	Boundary ID OR NV Marked with a three-sided stone inscribed with N-I-O on the respective faces
3	ID, NV, UT Land – 3mi	5233, 5230wp?	41.9934, -114.0415	Three Corners Private property. Marked with a granite monument inscribed with the respective states’ names
4	NV, UT, AZ Land – 4mi	2703, 2557wp?	37.0000, -114.0500	Boundary Initial Mon AZ NV UT
5	MT, ID, WY Land – 4-10mi	8330, 8347wp?	44.4780, -111.0532	– NOTES
6	ID, UT, WY Land – 0.57mi	7057	42.0016, -111.0468	Boundary Cor ID UT WY BLM NOTES
7	WY, UT, CO Land – 0ft	8408, 8402wp?	41.0005, -109.0500	GLO 28 CO UT WY Park and look
8	UT, CO, AZ, NM Land – 0ft	4866, 4870wp?	36.9988, -109.0452	CO UT AZ NM $3 fee
9	MT, ND, SD Land – 1.6mi	3048, 3055wp?	45.9449, -104.0454	Boundary Mon 360M NOTES
10	MT, WY, SD Land – 0.5mi	3422, 3428wp?	44.9973, -104.0578	NE Corner Wyoming NOTES
11	WY, SD, NE Land – 1mi	3932	43.0003, -104,0532	Chaffee Monument Private property
12	WY, NE, CO Land – 0ft	5386, 5382wp?	41.0016, -104.0532	Boundary Mon CO NE WY Park and look
13	CO, NE, KS Land – 0ft	3444, 3447wp?	40.0003, -102.0516	Boundary Mon CO KS NE Park and look
14	CO, NM, OK Land – 0ft	4445, 4444wp?	37.0000, -103.0022	Boundary MI Cor CO NM OK Park and look
15	NM, OK, TX Land – 0ft	4714, 4712wp?	36.5002, -103.0024	Texhomex Park and look
16	CO, KS, OK Land – 0ft	3687, 3692wp?	36.9927, -102.0419	Boundary Mon CO KS OK NOTES
17	ND, SD, MN Land – 0ft	970, 972wp?	45.9348, -96.5632	– Park and look. WIKI – not directly marked and most probably within Bois de Sioux River
18	SD, MN, IA Land – 0ft	1410, 1413wp?	43.5001, -96.4532	– NOTES
19	KS, OK, MO Land – 0ft	1024, 1016wp?	36.9985, -94.6178	Boundary Mon KS MO OK NOTES
20	OK, MO, AR Land – 0ft	1129, 1049wp?	36.4993, -94.6178	Bondary Mon AR MO OK Park and look
21	TX, AR, LA Land – 40ft	226, 224wp?	33.0191, -94.0429	Boundary Mon AR LA TX NOTES
22	IN, MI, OH Land – 0ft	1066, 1071wp?	41.6960, -84.8060	Ohio Mich Bdry Cor WP NOTES
23	TN, AL, GA Land – 600ft	720, 725wp?	34.9844, -85.6052	LS 1 NOTES
24	AL, FL, GA Land – 0.25mi	70, 83wp?	31.0005, -85.0008	– Private property
25	TN, NC, GA Land – 600ft	1760, 1758wp?	34.9878, -84.1918	– Private property
26	NC, GA, SC Land – 3.5mi	2149, 2147wp?	35.0005, -83.1083	Elicott Rock WIKI – Located in Chatooga River very near marker on land
27	KY, VA, TN Land – 1.1mi	1987, 1988wp?	36.6006, -83.6753	Virginia Corner 2 Reset NOTES
28	TN, VA, NC Land – 1.5mi	4628, 4636wp?	36.5879, -81.6774	North Carolina Corner Reset Private property
29	KY, VA, WV Land – 0.6mi	827, 828wp?	37.5378, -81.9680	– NOTES
30	PA, WV, MD Land – 0.57mi	2320, 2328wp?	39.7210, -79.4768	Mon 34 NOTES
31	MD, WV, VA Land – 0.25mi	260, 254wp?	39.3211, -77.7190	– WIKI – unmarked at low water line and almost always submerged
32.1	VA, DC, MD Land – 175ft?	10, 23wp?	38.9341, -77.1199	VA, DC, MD Private property
32.2	VA, DC, MD Land – 640ft?	8, 0wp?	38.7909, -77.0395	Boundry Mark 14 DC VA NOTES
33	PA, MD, DE Land – 800ft	255, 236wp?	39.7219, -75.7886	MDP Corner Private property
34	NY, PA, NJ Land – 0ft	420, 409wp?	41.3572, -74.6946	Tri States 1942 Waterside
35	MA, NY, CT Land – 1.5mi	2146, 2151wp?	42.0495, -73.4874	Boundary Bound CT MA NY NOTES
36	VT, NY, MA Land – 1mi	1417, 1436wp?	42.7457, -73.2649	Boundary Bound MA NY VT NOTES
37	VT, NH, MA Land – 775ft	197, 181wp?	42.7268, -72.4584	– Private property
38	CT, MA, RI Land – 0.8mi	630, 625wp?	42.0079, -71.7990	Tri State NOTES
51	WA, OR, ID Water – 300ft	866	tbd	– Snake River
52	CA, NV, AZ Water – 130ft	478	tbd	– Colorado River
53	SD, NE, IA Water – 350ft	1101	tbd	– Big Sioux and Missouri Rivers
54	NE, IA, MO Water – 275ft	907	tbd	– Missouri River
55	NE, KS, MO Water – 350ft	853	tbd	– Missouri River
56	OK, AR, TX Water – 300ft	292	tbd	– Red River island
57	MN, WI, MI Water – 25mi	600	tbd	– Lake Superior
58	MN, IA, WI Water – 525ft	621	tbd	– Mississippi River. Was apparently marked with a sign anchored at the spot, but the sign has been moved as of 2001.
59	IA, WI, IL Water – 325ft	604	tbd	– Mississippi River
60	IA, MO, IL Water – 0.25mi	483	tbd	– Des Moines and Mississippi Rivers
61	IL, KY, MO Water – 0.25mi	292	tbd	– Ohio and Mississippi Rivers
62	MO, KY, TN Water – 0.25mi	263	tbd	– Mississippi River – 3 locations due to meanders of the river.
63	MO, AR, TN Water – 150ft	240	tbd	– Mississippi River oxbow
64	AR, TN, MS Water – 700ft	189	tbd	– Mississippi River
65	AR, LA, MS Water – 690ft	80	tbd	– Mississippi River
66	TN, MS, AL Water – 0.25mi	427	tbd	– Tennessee River, Pickwick Lake
67	WI, IL, MI Water – 40mi	577	tbd	– Lake Michigan
68	IL, MI, IN Water – 9.5mi	577	tbd	– Lake Michigan – known as Indiana Dunes or Michigan Dunes Area
69	IL, IN, KY Water – 750ft	347	tbd	– Wabash and Ohio Rivers
70	IN, OH, KY Water – 700ft	460	tbd	– Near, but not precisely at, the confluence of the Great Miami and Ohio Rivers
71	OH, KY, WV Water – 100ft	518	tbd	– Big Sandy and Ohio Rivers
72	OH, WV, PA Water – 75ft	665	tbd	– Ohio River. Technically the Beginning Point of the US Public Land Survey, although the actual monument is 1112 feet north of the tripoint due to the tripoint’s current location under water.
73	PA, DE, NJ Water – 0.5mi	0	tbd	– Delaware River
74	CT, RI, NY Water – 1mi	0	tbd	– Fisher’s Island Sound
101	AK, YU, BC Canada, Land	-99	location	– Under glacier
102	BC, WA, ID Canada, Land	-99	location	– NOTES
103	BC, ID, MT Canada, Land	-99	location	– NOTES
104	BC, ALB, MT Canada, Land	-99	location	– Continental Divide
105	ALB, SAS, MT Canada, Land	-99	location	– NOTES
106	SAS, MT, ND Canada, Land	-99	location	– NOTES
107	SAS, MAN, ND Canada, Land	-99	location	– NOTES
108	MAN, ND, MN Canada, Water	-99	location	– Red River of the North
109	MAN, ONT, MN Canada, Water	-99	location	– Angle Inlet
110	ONT, MN, MI Canada, Water	-99	location	– Lake Superior
111	MI, ONT, OH Canada, Water	-99	location	– Lake Erie
112	ONT, OH, PA Canada, Water	-99	location	– Lake Erie
113	ONT, PA, NY Canada, Water	-99	location	– Lake Erie
114	ONT, QUE, NY Canada, Water	-99	location	– St Lawrence River
115	QUE, NY, VT Canada, Water	-99	location	– Lake Champlain
116	QUE, VT, NH Canada, Water	-99	location	– Halls Stream
117	QUE, NH, ME Canada, Land	-99	location	– NOTES
118	ME, QUE, NB Canada, Water	elev	location	– St Francis River
151	CA, BAJA, AZ Mexico, Water	-99	location	– Colorado River
152	BAJA, AZ, SON Mexico, Water	-99	location	– Colorado River
153	AZ, NM, SON Mexico, Land	-99	location	– NOTES
154	NM, SON, CHI Mexico, Land	-99	location	– NOTES
155	NM, TX, CHI Mexico, Water	-99	location	– Rio Grande River
156	TX, CHI, COA Mexico, Water	-99	location	– Rio Grande River
157	TX, COA, NL Mexico, Water	-99	location	– Rio Grande River
158	TX, NL, TAM Mexico, Water	-99	location	– Rio Grande River

cktest1-p4
cktest2-p3

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Method 1 – use PDF Embedder Plug-in

I thought this had the greatest chance of working. As you can see the basic “PDF Embedder” Plug-in does prevent direct download of the PDF. Unfortunately, you can simply right-click and “Save Image As…”. If we buy the “secure” version for $30, we can disable the right-click context menu. With the “secure” version they also put the PDFs in a special area so if someone tries to directly download the PDF they get a 403 error. We can do something similar (put in special protected area), but that does involve extra work on our side. The other unfortunate thing is that you can simply Ctrl-P print the webpage and the PDF contents show up. There might be other “pdf embed” type plug-ins which don’t have the “Save Image As…” context menu, but I haven’t looked for them. This plug-in seemed to be the most popular and supported one.

cktest2-p3

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Method 2 – use PDF flowpaper Plug-in

This was the method I was thinking of originally. Convert the PDF into a flipbook and embed it in the page. I’ve seen something similar done on other websites. Unfortunate the “flowpaper” Plug-in still allows direct download. Similar to PDF Embedder, I can simply Ctrl-P print the web page and see the contents. They offer a “read-only” version (I think $95) which disables the download/print buttons. But I suspect even with that you can Ctrl-P and get the contents. This free version of this plug-in only supports PDFs upto 15MB which might be a problem. I don’t know how large the AtoZ newsletters are. There are no size limits if we buy their enhanced plug-in. You’ll notice that this plug-in is the slowest to load though.

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Method 3 – use Google Drive

This is another “simple” method. We upload the PDFs to Google Drive. You can then set the view properties to disable print/copy/download and embed the resulting view into our pages. It seems to work – no direct way to download the PDF. But you can still Ctrl-P print the page and see the current PDF contents. For a multi-page PDF they simply scroll through and Ctrl-P each page; slow, kludgy, but they can get it. This applies to all the above methods as well.

Check this out! I was wondering can I overlay a transparent image on top of the PDF previewer and set its opacity. We can read through the image to the underlying PDF views but when we print the underlying PDF view is hidden by the foreground image. Similar to Method 4 below. Unfortunately this didn’t work initially. But with some further tweaking/research I discovered you can change the opacity if we are print versus screen. Now when you try to Ctrl-P this page, you’ll see the first Google viewer above, but you won’t see the below Google viewer. This gets a little complex to setup, but nothing like Method 4. Notice that I overlay and size the foreground image so that the scrollbar and bottom controls are available from the PDF viewer. A similar trick should work with Method 1 above.

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Method 4 – use background-image tag

I stumbled across this slick idea, but it is time consuming and involved. It isn’t as easy as the above 3 methods. We would first convert the PDF into a series of JPGs. We also create (reuse) a set of transparent GIFs. The idea is to have an <img> of the transparent gif, but underneath define a background-image which is the JPG of each page. So you are seeing through the transparent GIF to the background-image JPG. You can read it, but when you right-click and Save Image As…, what gets saved is the transparent GIF, not the background image (JPG). Pretty slick I thought. Even if you Ctrl-P, most web browsers will only print the foreground <img> images (transparent GIF for us), not the background-image (real JPG); although I just discovered Opera allows you do print the background images.